Answer:
Option B. mushroom.
Explanation:
Mushrooms are decomposers. Decomposers are those organisms which feed on dead bodies of plants and animals. Mushroom is a type of fungi which grows on dead bodies and broken down their body to release nutrients. These nutrients is again used by the organisms in the ecosystem such as plants. It also helps in the cleaning of environment by removing the dead organisms.
Natural selection can change in a population in multiple ways.
1) natural selection can lower a population by death (an example would be a plague)
2) A population can adapt to the natural selection (an example would be anti bodies for the plague)
Hope this helps
