If given a chance to advice Mr. Smith, I would recommend him
to minimize going out in the sun when it is at the peak of the morning but if
not possible since he works under the sun, it would be good to put on sunblock
with a highest SPF and use precautionary measures like using hats and wearing
long sleeve to protect also the skin. More
water to hydrate, and vitamins for skin protection.
An exothermic chemical reaction is change in the chemicals that can never be undone, an exothermic solution is a combination of chemicals
Polygenic inheritance is the pattern of inheritance where a wide range of phenotypes that result from many gene pairs in an individual organisms controlling a single trait.
Examples would include = skin colour and or measurement of height.