Is roasting the same thing as broiling?
Assuming an electric oven as typically seen in the US:

Roasting is the same setting as baking. The words mean slightly different things, but not to your electric oven.

Using the baking setting has the heat coming from the bottom of the oven, broiling has it coming from the top. The temperature is usually set very high to broil (if it can be set at all, some ovens only broil on the highest setting). Baking can be done at any temperature within the range of the oven.

What is called broiling in the US is called grilling in the UK.