Select the correct answer. What is a central idea of the passage?

A.
Whales are difficult to study because they are found in waters that are difficult to reach and covered in ice.
B.
The narwhal is a deep-water diving marine mammal with a single tooth, or tusk, for which it is best known.
C.
Whales, such as the narwhal, that inhabit Arctic waters feed mainly during the spring and summer months.
D.
The narwhal has a single tooth, outside of its mouth, unlike other marine mammals, who have many teeth.

Explanation:

Are you a gril or boy

the correct answer would be d, i never like waking up.

explanation:

iambic tetrameter is a meter which is basically a line consisting of four feet of iambic and it is used in poetry. it consists of unstressed syllables followed by a stressed syllable. in this question, the only statement which is giving the feel of being stressed is option d, which says that i never like waking up. it means the person is feeling stressed whenever he wakes up. he never likes to wake up and and whenever he wakes up, he doesn't like it. so a sense or feel of being stressed is in this statement.