The endoskeleton Is a calcium-rich formation
Answer: a. the lowest trophic level
Explanation:
The keystone species is the one on which the entire ecosystem depends upon. It maintains a balance in the ecosystem. If this species is removed the ecosystem will drastically change. The members of the keystone species are abundantly available at the lowest trophic level. This will help in making a balance in a community or ecosystem. If some members die others will be available to survive others.
Low level waste is nuclear waste
Germany believed that the allies were too harsh on Germany and believed they just intended to ruin Germany and push Germany out hence the Allie hang pushing the man