Q: Fact 1: Electricity sometimes is used for heating buildings. Fact 2: Electrical energy is also energy. Given the two facts above, what is energy used for?

Options are: 1. heating buildings. 2. courtship. 3. reversing time. 4. Plants growth. 5. Quality of life. 6. to stay warm. 7. destroying matter. 8. teleportation.
A:
1.