Affect or effect?

Affect is usually the action; effect is usually the result.

affect
The rain affected her mood.
effect
The rain had a strange effect on her mood.

To rememberAffect is the Action, Effect is the End result.

NotThe weather effected my mood.

SayThe weather affected my mood.

WhyTo influence something: affect.

Effect is also a verb meaning “bring about”, as in “effect change”; affect is a noun only in psychology.