Solar cooker takes more time as compared to the $LPG$ to boil potato or rice,yet Kunal uses solar cooker for such type of cooking:
$(a)$ Why does Kunal use solar cooker instead of $LPG$? Give reason for your answer.
$(b)$ Name the phenomenon which is responsible for obtaining high temperature in solar cooker?
$(c)$ What is the motivation behind using solar cooker?

(N/A) $(i)$ $(a)$ It is cost-effective as solar energy is free of cost.
$(b)$ It is an eco-friendly method that causes no pollution.
$(ii)$ The phenomenon responsible for obtaining high temperature in a solar cooker is the $Greenhouse$ $effect$.
$(iii)$ The motivation behind using a solar cooker is to promote the use of non-conventional and renewable sources of energy,as fossil fuels are limited and non-renewable.