Answer:
I think it would be lighthearted
Explanation:
None of the other answers really make sense, but if you are allowed a second answer if it is not lighthearted it would probably be serious
Answer:
b. them
Explanation:
their is used to show ownership
Ex: those are THEIR glasses
They is used to refer to a group of people or someones unknown gender
Ex: There THEY are
It is used to refer to objects
Ex: IT is a ball
there is more to it but this is a simple explanation
If the question is multiple choice, please include the options in the questions to make things easier.