<u>The sentences using the word "affect" correctly are:</u>
Rising food prices affect everyone in my community. ✓
Sunshine always has a positive affect on my mood.
That injury will affect her ability to swim in tomorrow’s race. ✓
Studies show that eating breakfast has a strong affect on one’s ability to concentrate.
Sad movies always affect my sister. ✓
<em>The other sentences the world should be "effect"</em>