Answer:
ABABCC
Explanation:
DEFINITION: A rhyme scheme the ordered pattern of rhymes at the ends of the lines of a poem or verse (according to the Oxford Dictionary)
Cloud is the first rhyme in the sentence, in which we call A.
Hills doesn't rhyme with cloud, so it is B.
Crowd rhymes with cloud, so we call it A.
Daffodils rhyme with hills, so we make it B.
Trees doesn't rhyme with anything else, so we call it C.
Breeze rhymes with trees, so we make it C.