Answer:
Cliff jumping.
Volcano trekking.
Cave diving.
Kayaking for the first time ...
Mountaineering. (one day it'll happen)
The Rickshaw Run.
You didn’t show the writing we don’t know
The correct answer is 2) Idiom
Idioms are literary devices and expression used to portray thoughts and ideas in a stylized and interesting, yet, non-literal manner. In the given sentence, the policeman is not implying that he literally "lay down the law". By "lay down the law" he means he had to take action and enforce the law. Another example of an idiom is the expression "under the weather". When someone says they are "under the weather", the meaning is not literal, what they actually mean is that they are sick or unwell.
B description, because the example describes what arachnids and spiders are
I would say airport, but non of them are objects.