Please answer this is super easy 6th grade science! Thanks!

The answer should be A. lithosphere.

Explanation:

Firstly, let's look at the options:

C. and D, both parts of the Earth at the core, have almost nothing to do with the Earth's crust or tectonic plates except maybe having a passive effect on them.

B. mantle is where the lava that moves the tectonic plates circulates due to convection, which is the reason they move at all. But, it is not where the tectonic plates themselves are.

Therefore, finally, we have A as the answer.

(As a sidenote, the "lithosphere" means the Earth's crust.)

Hope this helped!

currents is the correct answer.

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.