1. In my composion, I tried to give a definition of humor, but I found the idea too (petty, elusive) to pin down.

I think pitty is answer
2. Are you going to allow (elusive, petty) quarrels to destroy a friendship that has been built up for so many years? I think elusive
3. We will never allow vicicous rumors to (deem. generate) racial hatred in our school. I think generate

3 is correct.

1 and 2 are wrong.

humor means the quality of being funny

1. The word that best fits the context in the first sentence is "elusive." To confirm my answer, I would suggest looking up the definitions of both "petty" and "elusive" to determine which one aligns more closely with the idea of trying to define humor but finding it difficult to grasp or pin down. Also, consider the connotations and broader meanings associated with each word within the context of defining something abstract like humor.

2. From the provided sentence, the correct word choice is "petty." To confirm my answer, it would be helpful to understand the meanings and connotations of both "elusive" and "petty." By doing so, you can discern which word accurately reflects the idea of allowing insignificant or trivial quarrels to ruin a long-standing friendship.

3. The suitable word for the third sentence is "generate." To confirm my choice, it is recommended to look up the definitions of both "deem" and "generate" and consider which word better aligns with the meaning of spreading or creating racial hatred through vicious rumors. By understanding the connotations and implications of each word in the context of racial hatred, you can arrive at the correct option.