Answer:
Option C
Step-by-step explanation:
The higher the specific heat capacity of a substance, the higher will be the time taken to heat them.
Here,
Specific heat capacity of Concrete is 880 J/kg°C
Specific heat capacity of water is 4181 J/kg°C
Specific heat capacity of sand is 840 J/kg°C
Specific heat capacity of soil is 1810 J/kg°C
Hence, out of all these water will be heated the least by sun's energy
Hence, option C is correct