Question

caches come in all shapes and sizes. some are even fake rocks or wood to fool you!
choose a cache to look for
to get started, a player goes to a website on a
to look up the locations of nearby caches.
computer es details about each cache in the area.
map

Explanation:

To solve this fill - in - the - blank question, we analyze the context. The sentence is about a player going to a website to look up cache locations. Websites are accessed using a computer. A "map" is not a device through which one accesses a website to look up information in the same way a computer is. So the correct word to fill in the blank is "computer".

Answer:

computer