The mountain gorilla because they are listed on the endangered list.
Your answer will be b and c because you're planting of crops will take a while to grow so it is not a sudden change to the Earth's surface and if you're building a tunnel through the mountain it won't affect the Earth's surface
Answer:
None
Explanation:
Quartz is a silicate mineral. It is made up of interlocking chain of silica that forms a framework pattern. Pure quartz is made up of silica and silica alone. Silica has a formula of SiO₂. Quartz is pure silica.
Fe and Mg are not in the framework of silica. They even rarely occur as impurities in the structure of the mineral.
