Today is the first day of school. The parents are excited but their children​

According to stephen hawking in the "origin of the universe" lecture, "why are we here" and "where did we come from" are questions that

Wha is the topic discussed in “lifeboat ethics” ?

Which sentence uses all its nominative case pronouns correctly? a we live on the same street b them and rachel are good skaters. c the redskins fans in the family are fred and me d have joanne and him played tennis together before?