Heat from the sun moves through space by the process of
a. circulation.
b. conduction.
c. convection.
d. radiation. 17)

d.radiation

Explanation: Hi, radiation is the primary way that heat travels in space. On Earth, heat travels by radiation, convection, and conduction.

On Earth on a sunny day, the heat radiating from the Sun warms the molecules of the atmosphere, and they warm other molecules and they warm others in turn. That conduction is what keeps the Earth warm at night when we aren't receiving direct Sun rays. It also means that even when we are standing in shadow, the air around us has some warmth. On Earth, heat also travels in large density-driven convection loops that spread out the warmth. In space, heat can only exist where the heat waves are traveling. This is one reason why there is a huge temperature difference between Sun and shadow in space.

the correct option is option d

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."