PLEASE MARK ME AS THE BRAINLIEST and good luck on catching up <3
for the first pic, fungi: helps the environment by eating harmful bacteria. They are very important because they decompose wood and other materials that will then lead and go to the atmosphere.
Snail: snails are very important for the food chain because they eat rotting vegetation and fungi. Other animals count on snails so when they perish they can get all the nutrients from them
earthworm: earthworms are very important because they help the soil out .They make tunnels that lead water and air to roots.
Pill bug: They are decomposes which eat decaying plants.