Which of the following are molecules? (Select all that apply.) 1. MgF2
2. Br2
3. Na
4.C

Need this ASAP. Only ten points though, i'm new

Which answer tells the reason the earth’s climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.