The two things he is most grateful for his parents are for their unconditional love and support.
"For" is a preposition used to indicate the reason or cause for being grateful in this sentence. It clarifies that the gratitude is directed towards the parents for the specific actions or characteristics mentioned.
The two things he is most grateful for his parents are for their unconditional love and support.
"For" is a preposition used to indicate the reason or cause for being grateful in this sentence. It clarifies that the gratitude is directed towards the parents for the specific actions or characteristics mentioned.