Self-confidence, and all the others but mostly self-confidence
No a,b,c,d? ok they have the spines for defence. If they sense danger they blow themselves up revealing the spines, causing any predators to avoid the pufferfish.
Yes because they helped a bunch of people
The correct answer would be C.
As is the easiest word to use just make random sentence with it to your hearts content if you can not read this translate it.