The answer would be B) False cause a line graph only shows ''two'' variables, not three.
Answer:
C. Protect them from predators because their calcium carbonate exterior allows them to withstand an attack from their predators in their specific environment.
Explanation:
They build layers to protect themselves from predators. Plus, I've seen this question and got it right.
A. because you haven't released the object so therefor the potential gravity force applied becomes actual when released.
To find the actual volume you need to subtract 68.2 and 56.3 which would be 11.9 ml. density is mass divided by volume so 31.18 g/11.9 is equal to 2.62 g