Answer:
The correct answer is A) food
Step-by-step explanation:
Species diversity indicates a total number of different species that live in a community. If the species diversity is more then the community contains more number of individuals of different species.
So if the number of individuals decreases in a species than the species diversity will decrease. In an ecosystem, one species is dependent on another species for its survival because a species present on upper trophic level consume the species of its lower trophic level.
So if there is a loss of species diversity in lower trophic levels in the oceans then it will result in a shortage of food for upper trophic level.