I think the answer is Chlorophyll.
Answer:
Some animals have pouches to carry babies.
The babies are warm and are also protected from danger in their mother's pouch. Some animals have pouches to carry babies. Kangaroos are called marsupials because they have a special pouch for their babies.
Explanation:
I hope it helps you btw Can I get a brainliests please ☺️
I think B. Scientific research
They use carbo dioxide from the atmosphere during the process of photosynthesis. Also, after the producers die, their organic compounds are carried on to the decomposers.