Because (conjunction)

1. For the reason that; on account of the fact that.
2. On the grounds that; considering that.
3. In view of the fact that; since.
4. Due to the fact that; owing to the fact that.
5. By reason of the fact that.

Origin:

Old english becaus, becæs; related to by, cause.

Examples:

1. I am going to the store because I need to buy some food.
2. I will call you back because I want to talk to you.
3. I will finish the project because it is important.
4. I will take the job because it pays well.
5. I will make a difference because I care.