Ans 1: (Master Answer)
D
In the given food chain if the population of frog decreases, then it will lead to an increase in the grasshopper population. As there will be less frogs to feed upon the grasshoppers.
D
In the given food chain if the population of frog decreases, then it will lead to an increase in the grasshopper population. As there will be less frogs to feed upon the grasshoppers.
D
Sunita needs a waterproof container to carry water, so X cannot be a cardboard. Pihu needs a sheet to absorb oil, so Y cannot be plastic as it cannot absorb oil. Rahul needs a box made up of a material that is a bad conductor of heat, so it cannot be steel.
Y can be cotton as it will absorb the oil.