The machine is making less liquid oxygen than normal. What is wrong?

A) There was frozen water in tank 2, which is blocking some of the oxygen from going into tank 3

B) Some of the liquid oxygen evaporated in tank 3

C) Some of the oxygen didn't condense in tank 2

Identify the image that doesn’t depict a reproductive strategy. 1st image: a bird feeding their young residing in a nest. 2nd image: a lioness nestled with her young. 3rd image: leaves of a tree during the day time. 4th image: a fish gazing up at what appears to be bubbles or mosquito eggs.

List two modern organisms that have pentameral symmetry

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.