All 3 Uses

adapt
in
Dear John
(Auto-generated)

I can't tell you how many kids we have here who never adapt at all, no matter how long we work with them.†
Chpt 18 *

adapt = change to fit a different situation; or make suitable
The whole thing seemed designed to humiliate and brainwash us into following orders without question, no matter how stupid they might be, but I adapted more quickly than a lot of the guys.†
Chpt 1
I don't know maybe it was because he'd grown up on a ranch, but he adapted to this a lot more easily than most kids.†
Chpt 18

Definitions:

(1) (adapt as in: adapted to the new rules)
changed to fit a different situation; or made suitable
(2) (adapted as in: the species is well adapted for)
to be especially well suited or appropriate for something
(3) (meaning too rare to warrant focus)