The type of magma that builds up within a magma chamber determines the type of

a. magma that is created
b. volcano
c. eruption that will occur

Option C, Eruption that will occur

Explanation:

The constituents of magma especially the amount of gas in it is highly responsible for making a volcanic eruption exclusive.  

When a gas in entrapped with in a magma, a huge pressure is build on which keep on increasing with time and eventually it causes bursting of volcano thereby erupting magma. Also explosive eruptions causes  pyroclastic flows which destroys everything coming in their path.  

For example - Phreatomagmatic eruptions  

Thus, the constituents of magma are important to determine the type of eruption that will occur.

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.