Biotic forces can cause changes to the surface of Earth. Which is the best example of living organisms causing weathering?
A B C D
Beavers building a dam across a stream. Cattle walking and grazing in a grassland. Salmon making nests for their eggs in a stream. Tree seedlings growing and forming cracks in rocks.
Question: Biotic forces can cause changes to the surface of Earth. Which is the best example of living organisms causing weathering?
(A) Beavers building a dam across a stream.
(B) Cattle walking and grazing in a grassland.
(C) Salmon making nests for their eggs in a stream.
(D) Tree seedlings growing and forming cracks in rocks.

Answer: (D) Tree seedlings growing and forming cracks in rocks.
Answer: (B) Cattle walking and grazing in a grassland.
Question: Biotic forces can cause changes to the surface of Earth. Which is the best example of living organisms causing weathering?
(A) Beavers building a dam across a stream.
(B) Cattle walking and grazing in a grassland.
(C) Salmon making nests for their eggs in a stream.
(D) Tree seedlings growing and forming cracks in rocks.
Answer: (D) Tree seedlings growing and forming cracks in rocks.