Problem: How does the sentence end?

Jessica's parrot eats a lot less food than the one that Sarah owns because 
Answer: Jessica 's is smaller.

Problem: How does the sentence end?

It took James all the days of the month to finish the paintings because the 
Answer: days are short.

Problem: How does the sentence end?

Leslie was able to jump to the top of the wall while leaving Brian behind because 
Answer: Brian is short.

Problem: How does the sentence end?

Randy avoided the chicken parmesan and a side salad, but Ryan ordered something else, because 
Answer:
Ryan was on a vegetarian diet.