Answer:
The autotrophs of coral reefs produce more chemical energy per unit time as compared to the producers of temperate forests.
Step-by-step explanation:
Primary productivity refers to the total of the sunlight energy that is converted into chemical energy of the organic compounds by autotrophs over a given period.
The statement means that the producers of the coral reefs produce more chemical energy per unit time than the chemical energy produced by producers/autotrophs of the temperate forests.