Answer:
a. varying the sizes of the objects to create and illusion of depth
Answer:
The answer is "both". Its a plural indefinite pronoun.
Explain the processes used in forming metals. Name one occupation in history that has used forming in metalworking. ... Forming can also include casting, which involving shaping the metal using a hammer or some other form of pressure. Forming has been most commonly used by blacksmiths for centuries.
