Arrange the given organisms involved in an ecosystem in correct sequence from lower to higher order.
(A) Fish
(B) Phytoplankton
(C) Man
(D) Zooplankton
Choose the correct answer from the options given below.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (B), (D), (A), (C)
A food chain shows who eats whom. It begins with the producer and passes energy step by step to herbivores and then to carnivores. This is a food chain of a water body.
(B) Phytoplankton — first. Phytoplankton are tiny floating algae. They make food by photosynthesis, so they are the producers.
(D) Zooplankton — second. Zooplankton are tiny floating animals that feed on phytoplankton; they are the primary consumers.
(A) Fish — third. Small fish eat zooplankton, so they are secondary consumers.
(C) Man — last. Man eats the fish and is the top consumer of this chain.
Note: The same question was also asked in CUET (UG) 2025 on 30-05-2025 (Slot 1).