All 3 Uses

vary
in
I Am Number Four
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On Lorien there were two types of citizens, those who develop Legacies, or powers, which can be extremely varied, anything from invisibility to the ability to read minds, from being able to fly to using natural forces like fire, wind or lightning.†
p. 29.6

varied = differed; or changed
It varies from Garde to Garde.†
p. 120.8 *

varies = differs; or changes
Then he reaches down and removes seven glass orbs of varying sizes from the bag.†
p. 174.7

varying = differing; or changing

Definitions:

(1) (vary)
to be different, or to change

Vary is often used to describe small differences or changes--especially about things of the same type. It would be more common to say "The weight of full-grown elephants varies depending upon diet and other factors," than to say "The weight of elephants varies from that of mice."
(2) (meaning too rare to warrant focus)