All 4 Uses

vary
in
A Bend in the River
(Auto-generated)

They were all in varying ways like Ferdinand, and they were often as young as Ferdinand.†
p. 91.3 *

varying = differing; or changing
The dimmest boys were naturally the ones with the most varied prospects; they could be anything; and in their pigeonholes the brown envelopes fell as thick as autumn leaves.†
p. 143.5

varied = differed; or changed
In my mind I had my own picture of Yvette, and this never varied.†
p. 156.2
An echoing voice was varying its pace and pitch, and there was the roar of a crowd.†
p. 205.2

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)