A) Relocating/subject
A gerund is specifically, a noun made by adding the suffix "-ing" to a verb. In this case the only gerund is "relocating", which means that that must be the correct answer. So, by process of elimination, A is the correct answer.
The heroism of unquestioning sacrifice. They asked no questions. Instead, they followed their orders with honor and courage.
Pop music is usually full of lyrics that appeal to young people that haven't had the chance to experience the world much, so the obscenities such as sex and money usually appeal to them. They are also usually fast paced and great for dancing which is not something that older audiences can do as much as the young ones. Many pop songs also emphasize youth as the greatest virtue, so it's not really adequate for an 80 year old person to behave like a 16 year old and sing how great it is to be young.
The sentence that states to help save the day, here he must get past a scary three headed Guard dog. This is because in the Greek Mythological literature there are lots of creatures such as three headed monster’s like the guard dog.