I believe the answer is “false”. While it’s true that many sea anemone will stay in one spot that they are happy with, it’s not true for all. Many sea anemone move around, especially when they are younger. It’s when they’re older they are more sessile.
Answer: 32.066 atomic mass units
B is the correct option.
The ground water would be greatly reduced and could be polluted, and surface water would collect way more than if the area was covered by vegetation.