Question

what is an angle grinder used to grind? soft, porous materials imperfections in wood nonmetals only hard, heavy materials

Explanation:

An angle - grinder is a powerful tool used for cutting, grinding, and polishing hard and heavy materials like metals, masonry, etc. It is not suitable for soft, porous materials or wood imperfections. It can be used on metals as well as non - metals for grinding tasks.

Answer:

D. hard, heavy materials