A family raises a species of fish in a pond at the end of each summer. The family sells the fully grown fish one year. The family notices that the fish are smaller than they had been in the previous year which statement best explains this observation
A. There was less food available in the pond this year than last year.
B. There was less space in the pond this year than last year.
C. The type of fish in the pond this year tend to be smaller than the type of fish last year.
D. There were fewer fish this year than there were last year.