Hel A scientist is designing an investigation to study the impact of UV radiation present in high-altitude habitats on the population of mountain yellow-legged frog. What type population is most likely to be a control group for the study? (4 points)

a
Mountain frogs in low-altitude habitats only

b
Mountain frogs in their natural high-altitude habitat

c
Mountain frogs in a lab setting exposed to UV rays from a sun lamp

d
Mountain frogs in a lab setting with no UV ray exposure

c

Explanation:

if the scientist was to look close there skin would be tightened up on the frog it is hard to see but if you look close you could see it

i believe it would be c: tons.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.