B.they are excreted and float freely around the body ,hunting infections
Answer:
My best guess would be that the barnacles coexisted with the oysters 100 mya.
Explanation:
Since similar oysters were found both in North America and Europe, we know that the oysters were roaming the earth when North America and Europe were once connected. And since barnacle fossils were found in the same layer, we know that they both coexisted 100 mya.
I do not know the options for this question, so this was my best guess.
Answer:
The water cycle or hydrologic is a continuous cycle where water evaporates, travels into the air and becomes part of a cloud, falls down to earth as precipitation, and then evaporates again. ... As clouds move up and over mountains, the water vapor condenses to form precipitation and freezes.