Affect , Effect
To affect means “to do something that produces an effect in something”.
To effect means “to make something happen”. As a noun, effect means “the way in which something is changed; a result, or an outcome”.
This decision will affect our lives.
The disease affected his nervous system.
Inflation affects the buying power of people.
The new director effected (=caused) a positive change.
The effect of having a new director was positive.
Inflation has an effect on the buying power of people.