Photophores are:
A) microscopic organisms that are responsible for the color of another organism
B) cells or tissue that produce light
C) cells that change color
D) microscopic organisms that produce light

B) cells or tissue that produce light

Explanation:

It wouldn't be A because photophores do not affect the color of other organisms.

It wouldn't be C because the cells produce light, they don't necessarily change color.

Lastly, it wouldn't be D because it isn't a whole organism producing the light, it's an organ. Organs are multiple tissues working together, and tissues are groups of cells.

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.