Question

Read the passage given below and answer the question. 
Food chains ‘P’ and ‘Q’ form an interconnection. ‘P’ initiates with wheat grass whose population supports a few grasshoppers, frogs and snakes. 
‘Q’ starts with dead decaying leaves of wheat grass which are eaten by earthworms and then food chain is continued with frog of food chain ‘P’. 
Identify the types of food chains ‘P’ and ‘Q’:

• A. A
• B. B
• C. C
• D. D

Hint:

Grazing food chains begin with living plants; detritus food chains begin with dead and decaying matter.

Answer 1

The Correct Option is B

Food chain 'P' starts from wheat grass and follows a typical grazing food chain (grass → herbivore → carnivore).
Food chain 'Q' starts from dead organic matter (detritus) consumed by earthworms, which join food chain 'P' at the frog level — this makes it a detritus food chain.