Pretty sure its truth / no edit here
C. Radioactivity
is the answer
and Uranium is an element that produces radioactivity
I think it should be producers. i apologize if this is wrong, but that’s my best guess. hope this helps you!
Decomposers are necessary in the food chain because they return nutrients to the ecosystem (2)
The sea because if you ever been to the beach when the waves pick up it becomes hard
