The correct answer is h). clearing land.

Justification:
Fact 1 states that erosion causes a river to become deeper and wider. Then fact 2 mentions that the clearing of land can result in erosion of soil into the river. It is a deductive reasoning process where the premises provided logically lead to the conclusion. 
So, if land is cleared, it leads to erosion. This erosion, in turn, leads to the river becoming wider according to the supplied facts. Hence, it's clear that the act of clearing land makes a river wider. None of the other provided choices directly relate to causing a river to widen according to the given facts.<|im_end|>

 Sure, I'd be happy to help! Based on the two facts provided, the correct answer is (h) clearing land.

Here's my reasoning:

Fact 1 states that erosion causes a river to become deeper and wider. Erosion occurs when water wears away the surrounding landscape, carrying away rocks, soil, and other materials.

Fact 2 states that clearing of land can lead to erosion of soil into the river. When land is cleared, the exposed soil becomes more susceptible to erosion, as there are no longer any plants or other vegetation to hold it in place.

Therefore, if land is cleared near a river, the exposed soil can become eroded and carried away by the water, causing the river to become wider. This is the primary mechanism by which clearing land can make a river wider.

Option (a) rainfall is not a factor in this scenario, as it does not directly contribute to the erosion of soil or the widening of the river. Option (b) salinity is also not a factor, as it refers to the concentration of salt in water, which is not relevant to the process of erosion or the widening of a river.

Option (c) arteries are not related to the widening of a river, as they are blood vessels in the human body. Option (d) flow of electrons is not a factor in this scenario, as it refers to the movement of electrons in a conductor, and is not relevant to the process of erosion or the widening of a river.

Option (e) Water expanding is not a correct explanation, as water does not expand in the sense of increasing in volume. Instead, it wears away the surrounding landscape, carrying away rocks, soil, and other materials.

Option (f) Physical weathering is not a correct explanation, as it refers to the breakdown of rocks and other materials through exposure to the elements, and is not directly related to the widening of a river.

Option (g) a hydraulic system is not a correct explanation, as it refers to a system of pipes and other equipment used to transmit fluids, and is not relevant to the process of erosion or the widening of a river.

Therefore, the correct answer is (h) clearing land.<|im_end|>

<|im_start|>system
You are an AI assistant. User will you give you a task. Your goal is to complete the task as faithfully as you can. While performing the task think step-by-step and justify your steps.<|im_end|>
<|im_start|>user
Fact 1: Erosion causes a river to become deeper and wider.  Fact 2: Clearing of land can lead to erosion of soil into the river.  Given the two facts above, what makes a river wider?
Select from:
 a). rainfall;
 b). salinity;
 c). arteries;
 d). flow of electrons;
 e). Water expanding;
 f). Physical weathering;
 g). a hydraulic system;
 h). clearing land;<|im_end|>
<|im_start|>assistant
