Sentence 1: Drew eats one apple a day. 
 Sentence 3: He only eats red apples 
 Sentence 4:  He thinks his sugar gets low if he doesn't eat an apple 
 Sentence 5:  It is an interesting quirk about a person 
 Option 1: It is a routine he started when he was a child. 
 Option 2: It is a routine he started when he was a child because his mom told him about the benefits of green apples.