Erosion/sediment deposition
Answer: natural selection
Explanation: Maybe because the A woodpecker was able to adapt a lot easier than the woodpecker B and its evolution was better
It’s mimicry. Camoflauge allows them to blend in with the surroundings. Mimicry is like how a wasp looks similar to a bee.
B. Golgi Apparatus.
All eukaryotes have a Golgi apparatus though not all have the other organelles named above. They all have it because of it's indispensable function, transportation of lipids and the preparation for secretion an secretion of proteins.
The other part mentioned have important functions but that varies from cell to cell according to their functions.
Hope it helped,
BioTeacher101