I'll give you a question, please answer with step-by-step reasoning process.
What does a person do before going on vacation?\nOptions:\n- rest in bed\n- lie in bed\n- buy food\n- cross street\n- water plants

water plants
Going on a vacation means to stay away from home.

People generally have plants at home.

Plants need water everyday to survive.

People usually water their plants before going on a vacation so they do not die until they return.

.

The answer is water plants