Explain the usage of affect and effect.

The words "affect" and "effect" are often confused due to their similar spellings and pronunciations. However, they have different meanings and functions in a sentence.

1. Affect (verb):
- "Affect" is primarily used as a verb, meaning to influence, change, or have an impact on something or someone.
- It refers to the action or process of producing an effect or change.
- Example: The loud noise affected my concentration during the exam.

2. Effect (noun):
- "Effect" is mainly used as a noun, representing the result or consequence of an action or event.
- It refers to the outcome or the impact that something has on someone or something else.
- Example: The effect of the loud noise was a decrease in my concentration during the exam.

It is important to note that "effect" can also be used as a verb, but it is less common and has a different meaning:
- As a verb, "effect" means to bring about or accomplish something.
- Example: The new policies will effect positive changes in the company.

To summarize, "affect" is a verb that means to influence or produce an effect, while "effect" is a noun that refers to the result or consequence of an action. Remembering this distinction will help in using these words correctly in various contexts.