Basaltic magma has the lowest viscosity, so more of it reaches the surface; the more viscous rhyolitic magmas are so sluggish that they tend to be trapped deep below the surface where they cool, solidify, and grow into the larger mineral crystals of plutonic rocks. a. True. b. False.

True

Explanation:

Magma are molten materials which are found beneath the earth, when molten magma gets frozen they form Igneous rocks.

Basaltic magma

is one of the three types of magma,it is known to be high in iron, magnesium, and calcium contents but it has a low in potassium and sodium content, they have the lowest viscosity.

Rhyolitic magma are of the three types of magma, they formed as a result of the differentiation of Basaltic magma accompanied by the assimilation of materials which contains silicon, THEY ARE KNOWN TO BE SLUGGISH AND MORE VISCOUS WHEN COMPARED TO BASALTIC MAGMA.

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