Which needs less heat to increase its temperature,
water or sand?

Sand!

Explanation:

Water has very high specific heat, which means that it needs to absorb quite a bit of energy before its temperature starts to change. Sand has a much lower specific heat, so it needs to absorb less energy.

Hope this helped! If so, would it be possible to get brainliest~

If not, that's fine too! Have a nice day :)

. west