The bleaching of coral reefs as mentioned in paragraph 4 indicates ________.

The period after the sixty-fifth birthday during which people may apply for Medicare is________.

To word “deducted” in the passage can be replaced by________.

Which of the following best describes the organization of this passage?

The expression “keep tabs on” in line 17 is closest meaning to________.

That humans should all have some fat in our diets is, according to the author

The word "tempting" is closest meaning to ________.

According to the passage, which of the following does NOT describe carbohydrates?

To start coverage by Medicare on their sixty-fifth birthday, people must apply________.

People would pay 10% more for their insurance if they________.

To word “elapsed” in the passage most closely means________.

This passage probably appeared in which of the following?

The word "them" refers to ________.

According to the passage, human-generated air pollution in localized regions ________.

The pronoun "those" in paragraph 2 refers to ________.

What does the word “this” refer to in line 8?