Question

the root greg means group. what does the word aggregate mean? to copy a design to gather into a single unit to engage in a charitable act

Explanation:

The root "greg" means "group". The prefix "ag - " often means "toward" or "to". So combining the prefix and the root, "aggregate" should relate to bringing things into a group or a single unit. "To copy a design" has no relation to "group", and "to engage in a charitable act" also doesn't relate to the meaning of the root "greg". So the correct meaning is "to gather into a single unit".

Answer:

to gather into a single unit