Concept:"Affect" means "to influence", while "Effect" means "the result of an action".
Explanation:"Affect" is primarily used as a verb.
It means to influence or bring about a change in something.
Example: "The rain might affect the picnic."
"Effect" is primarily used as a noun.
It means the result, outcome, or consequence of an action.
Example: "The positive effect of the medicine was noticeable."
Option A is incorrect because "Affect" does not mean the origin of something.
Option C is incorrect because "Effect" does not mean the reason.
Option D is incorrect because it reverses the meanings of the two words.
Only Option B states both meanings correctly.
Answer:Option B: Affect means to influence and Effect means the result of an action.