C. The platypus, which is a mammal, has a bill like a duck and feet like an otter.
"which is a mammal" is an adjective clause. An adjective clause is used to describe a noun and usually begins with one of these words: that, when, where, who, whom, whose, which, and why. In this sentence, the adjective clause begins with "which" and describes the platypus, which is a noun.
Answer:
A
Explanation:
Throughout the passage, the author takes the stance that too much gaming is unhealthy and is a bad obsession for young people.
Let's analyze the answer choices.
A.
This choice is correct. The passage states that "young people become obsessed with video games". The author also says that "many gamers play indoors...They rarely do any outside activities, including exercise." If a sentence about the harmful effects of no exercise was added, it would help support the argument that too much gaming is harmful.
B.
This choice is incorrect. This sentence has nothing to do with the fact that excess gaming is bad.
C.
This choice is also incorrect. A release date for the PlayStation 3 doesn't help persuade the readers that too much gaming is not good.
D.
This choice is also incorrect. Games without consoles do not support the argument that gaming in excess is bad.
The best choice is A: A lack of physical activity can lead to obesity and diabetes.
