I need help please my teaching is going to go crazy if I didn’t do it

Which of these best describes an ionic bond?

1) which of the following is the best example of a physical change? a) sugar dissolving in tea b) firefly glowing 2) in the combustion of ethane, what is/are the reactants? c2h6 + o2 ==> co2 + h2o a) c2h6 and o2 b) co2 and c2h6

What is the best describtion of the side of the moon that faces earth?