What are sediments? A Small sections of tectonic plates
B Small pieces of rock or soil material
C The new minerals created after chemical weathering
D The new land created by deposition​

B I think.

B

Explanation:

They come from other Rocks or living things such as bones,leaves,stems, etc.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.

d. planting trees

the trees take in carbon to make oxygen.