Which prenatal stage begins when a zygote is created through fertilization? A fetal stage
B. zygote stage
C. embryonic stage
D. germinal stage

The correct answer is option b. "by their dominant processes that formed them".

Explanation:

Mountains are classified in four different types according to the dominant processes that formed them. The four different types of mountains are: upwarped mountains, fault-block mountains, folded mountains and volcanic mountains. Upwarped mountains are produced by a differential of pressure from inside the Earth that pushed the crust upwards. Fault-block mountains were formed by tectonic plate movement, folded mountain when two plates move together, while volcanic mountains are formed by a crack in the Earth known as volcanic vent.