Based on the information in this passage, which activity is most similar to geocaching?
a.
competitive freestyle skiing
b.
synchronized team swimming
c.
remote-controlled car racing
d.
cross-country track racing

C)

Explanation:

I can't find the information that should be in your question but I will give you some useful information about it.

Geocaching is an activity where players are looking for treasures that are hidden and in that way, they are also exploring new locations.

They can use GPS receivers to track the cache.

Since the cross-country track racing and synchronized team swimming are done in a group of many people that are swimming or running together I would say that those activities aren't similar to geocaching. Both of them had their route and they are not able to explore new or interesting locations.

In competitive freestyle skiing, people can do freestyle activities such as Aerial skiing or Mogul skiing.

1- cleans/ tidies up

2- were

3-would be

4- had known

5-takes

6-must be/ have to be/should be