Fungi and bacteria are plants decomposers producers

Decomposers.

Explanation:

When the plants and animals die in nature, they become food for the decomposers like fungi and bacteria.

Decomposers are known as saprotrophs that recycle the dead plants and animals into the chemical form of nutrients. These nutrients are carbon and nitrogen which is released back into the air, water and soil.

Fungi release enzymes outside their body to decompose the plants and animals as they cannot synthesize their own food they obtain nutrition by this mode of nutrition.

the dark variety, as they are not visible on the dark tree barks

explanation:

it's c. (to reduce the greenhouse effect/carbon gasses)