Answer:

both a and r are true and r is the correct reason for a

Answer:

d

Explanation:

correct answer is

assertion is false but reason is true

• as the energy always Travels through a single direction

• energy obtained from solar energy by the autotroph never revert back to sun

• similarly the energy obtained by the animals from the autotrophs cannot be reverted back to the autotrophs

• so it concludes that the in a food chain energy flow takes place in a single direction and the assertion is false and reason correct