Problem: How does the sentence end?

The scandal started at the school and spread to the town, so the 
Answer: school was the source of their problems.

Problem: How does the sentence end?

The fitness level of Derrick was horrible and that of Justin was amazing, due to 
Answer: Justin being healthy.

Problem: How does the sentence end?

Avery went to the beach but stayed in the sand instead of getting in the water because the 
Answer: sand was warm.

Problem: How does the sentence end?

Rachel was a bona fide fashionista compared to Megan , so 
Answer:
Megan always was eager to seek fashion advice.