The steps needed to solve environmental problems include A. waiting for the affected species to leave an ecosystem that is in trouble.
B. leaving the problems for the next generation to address.
C. educating the public about the problems and the costs of their solutions.
D. taking any necessary action, regardless of the consequences or adverse
effects

i believe the answer would be b. hope it : )

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.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.