The correct answer is option (B):
Hook
The relationship in the first pair, Belt : Buckle, is that a buckle is a component or part of a belt. It's the mechanism that fastens the belt.
Now we need to find a word that has a similar relationship with "Net." A net is something that is used to catch things.
Looking at the options:
* Clasp: While a clasp can fasten something, it's not the primary function of a net.
* Hook: A hook is a part of a net. Nets can be held up by hooks. Nets can also catch things with hooks.
* Ring: Rings are not part of nets
* Clutch: A clutch is not a part of a net.
* Strap: A strap is not a part of a net.
The most fitting answer is Hook because a hook can be a component or a tool used in conjunction with a net, providing a means of fastening it or catching something with it. It fulfills the same relationship as "Buckle" has with "Belt."