Can someone help PLZ will give BRAINlLIEST if right for the two pages

Explanation:

page 452: Sweat glands in the skin release more sweat. The sweat evaporates removing heat energy from the skin.

Blood vessels leading to the skin capillaries become wider - they dilate - allowing more blood to flow through the skin, and more heat to be lost.

page 453: it is important to keep the flexibility because it helps from harmful things in the outside world such as moisture, the cold and sun rays, as well as germs and toxic substances.

2257000 J

Explanation:

Applying,

Q = Cₓm Equation 1

Where Q = amount of energy need to boil the water, Cₓ = Enthalpy of vaporization of water, m = mass of water.

From the question,

Given: Cₓ = 2257000 J/kg, m = 1 kg

Substitute these values into equation 1

Q = 2257000×1

Q = 2257000 J

Hence the energy needed to boil all of the water is 2257000 J