What would happen to consumers if there were no producers?

The consumer would have to make what they need themselves or find someone who can make what they need and of course pay them.

If there were no producers than there would be a lot less if whatever it's taking about, so then the amount of consumers would start to die off because of the fact that producers aren't producing which means that the consumers have nothing to actually consume.

1- Option (D)

2- Option (C)

Explanation:

The rocks of oceanic crust are created by spending a huge amount of time in a water-rich environment. During the subduction process, the plates at greater depth are comprised of rocks that contain water in them. As this water reaches the mantle, the conditions of pressure and temperature forces these hydrated rocks to remove the water from them. This water then mixes up with the mantle and thereby reduces the melting point of the mantle rocks. This results in the formation of magma. These magma being lighter eventually rises upward that eventually leads to the formation of the volcanoes. This process of melting is known as the hydration-induced melting.

Thus, the hydration-induced melting process is responsible for the formation of volcanoes on the overriding plates.

Hence, the correct answers are mentioned above.