The secretes hormones that regulate the body's fluid levels.
A. adrenal
B. pitiutary
C. testes
D. thyroid

c

explanation:

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

oxygen = 21% of the atmosphere

nitrogen = 78%

carbon dioxide = 0.1%

argon =0.934%