Biologist use the scientific method to answer questions about:
a. computer
b. government election
c. the living world
d. the stars and planets.

answer; /// i believe the correct answer is (reactants);

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

ok yes, but what is the question? as soon as you ask the actual question i will answer it. : )