And, But, & Or
We use and, but, and or to join ideas. And is used to join similar ideas. But is for joining contrasting ideas. Or is for joining alternative ideas:

Right now, Mark is watching TV, and Joanne is reading.

For dinner, I am having spaghetti and bread.

I don't like onions, but I love carrots.

Susan is a doctor, but she doesn't work at the hospital.

Is Brenda in the living room or the kitchen?

There are three or four customers in the store.
So & Because
Because is for describing reasons. So is for results:

We're eating because we're hungry.

I don't want to go outside because it's raining.

The children are playing, so they're happy.

They are married, so they live together.
Exercise
Open the exercise to begin the activity. Follow the instructions in the document.