During most nuclear reactions a. heat energy is produced but not light energy. b. energy is transferred out of the system. c. energy is lost as cold fusion. d. energy is created in the system.

A)heat energy is produced but not light energy

By comparing the structure of a house to the structure of a healthy diet.

Explanation:

When a writer tries to grab a reader's attention, they will most likely put a hook at the beginning of the paragraph. At the beginning of this paragraph, the writer compares the structure of a house to the structure of a food diet by saying "Eating a healthy diet is a lot like building a house." Hope this helps :)