Answer: (1)C includes saprophytes _ _ _ _ _ and _ _ _ _ _, and can be divided into the remains of animals, trees and grasses.

(1)C is the resolver. In the ecosystem, the remains and relics of animals and plants are decomposed into inorganic substances such as carbon dioxide, water and inorganic salts by a large number of bacteria and fungi, and then returned to the soil to be re-absorbed by green plants, thus making organic substances. It can be seen that bacteria and fungi are decomposers in the ecosystem and promote the material circulation in the ecosystem.

(2) Plants lose water through transpiration, which can promote water transport and make water rise from roots to leaves. Therefore, the power of water transport comes from transpiration of plants. The water vapor lost by transpiration promotes the water cycle. The water in A and B is used by plants for photosynthesis, and the organic matter produced is used by plants and animals.

(3) Can animals promote the development of the biosphere? Material circulation can also maintain the species and quantity of organisms in the biosphere relatively stable.

(4) Reducing greenhouse gas emissions (planting trees with various flowers; Saving and recycling water; Green travel mode; Electricity saving and solar terms; Opening the refrigerator door less than 5 times can reduce carbon100g or more; Buy shampoo in large packages and reduce carbon by more than three kilograms a year; It is cost-effective to use cloth bags instead of plastic bags.

So, the answer is: (1) bacteria; Fungi; Carbon dioxide; Water and inorganic salts

(2) transpiration; Water cycle; Photosynthesis; Organic matter? (3) recycling materials (4) reducing greenhouse gas emissions (planting trees with various flowers; Saving and recycling water; Green travel mode; Electricity saving and solar terms; Opening the refrigerator door less than 5 times can reduce carbon100g or more; Buy shampoo in large packages and reduce carbon by more than three kilograms a year; It is cost-effective to use cloth bags instead of plastic bags.