NEET Biology question

In an open ocean, the biomass of primary producers (microscopic algae) is often lower than the biomass of higher trophic levels (zooplanktons and fish), illustrated by an inverted pyramid of biomass. How can there be enough food in an open ocean to support the higher trophic levels?

• (A)The microscopic primary producers are a source of food of high quality
• (B)The microscopic primary producers have high rates of growth and reproductionCorrect
• (C)The microscopic primary producers are less abundant
• (D)The higher trophic levels are cold-blooded animals which do not require much food