Question

what causes the tail of a comet?
a. the suns gravity
b. earths gravity
c. friction in outer space
d. the heat from the sun

Explanation:

When a comet gets close to the sun, the heat from the sun causes the comet's ices (such as water - ice, carbon - dioxide ice) to sublimate into gas. These gases and dust particles are pushed away from the sun by the solar wind and radiation pressure, forming the comet's tail. The sun's gravity keeps the comet in orbit but is not what causes the tail. Earth's gravity has no impact on the comet's tail formation, and there is very little friction in outer - space to cause the tail.

Answer:

D. The heat from the sun