Part a observing the rock cycle chart, we can determine that metamorphism can affect view available hint(s) both igneous and sedimentary rocks only metamorphic rocks o any of the three types of rock o only sedimentary rocks submit part b the igneous rock identification key is used to identify igneous rocks based on their view available hint(s) texture and mineral composition color and texture

1. any of the three types of rock, 2. color and texture

Explanation:

A rock chart gives us a detailed view or description of all the types of rocks in the system there recycling and their formation from the companion inside the earth as the sedimentary, igneous and, morphic rocks. Formation of magma and the processes that lead top there erosion and deposition. The igneous ricks on melting are a product of magma and when they erode they tend to form the sedimentary rocks after lithification and which tends to form the metamorphic rocks from the metamorphism process. And in between these can again get converted to sedimentary. Igneous rocks are characterized by the color, textures and grain sizes and they are non-porous rocks thus considers the primary rocks.

The answer is a but it also might be 7 so

It is useful for historians to write narratives so that history can be passed on from their point of view.  think about a story being told in third person, then think about it again being told in first person, by someone who actually experienced the event.