A- Gravity. I believe it is gravity since that is the only one that makes sense in this situation. I hope i helped! :)
Herbivorous are the primary consumers
The primary consumers are herbivores animals sch as cows,goats,and elephants. They consume plants. Plants are the producers. To be able to extract energy from plants,herbivores must eat a large chunk of plant materials which explains why herbivores has to eat consistently.
The answer would be D. Shrubs, fungi, insects, and bacteria. Shrubs and fungi are definitely main decomposers and insects and bacteria do consume dead matter and waste so they also count as decomposers.
They are all made of eukaryotic cells and have a nuclei
