Scientists believe the moon was formed

a. from the collision of protoplanet and proto-earth

b. the collision of two nearby asteroids

c. from the crust of what is now the pacific ocean

d. a gigantic volcanic eruption in proto-earth

The answer would be A) From the collision of protoplanet and proto-earth

Explanation:

The theory is that the Moon was formed when a Mars-sized object slammed into the Earth, billions of years ago. This collision turned the newly formed Earth into a molten ball of rock again, and ejected material into orbit. Most of the material crashed back into the Earth, but some collected together from mutual gravity to form the Moon. The planet never survived the collision, but we believe that large parts of that planet now form part of our Earth and of the Moon as well.

1. glaciers are melting

2. more water going into ocean (water's such as fresh waters, etc)

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.