Answer:
Wavelength, 
Explanation:
Given that,
Frequency, 
We need to find the wavelength of a photon of light. The relation between frequency and wavelength is as follows :

So, the wavelength of the light is
.
Answer:
A. Chlorine
Explanation:
Chlorine has 17, Hydrogen has 1, Oxygen has 8, Sulfur has 16.
Greenhouse gases are the gases in the atmosphere that keep the air in the atmosphere. It also traps the sun's sunlight. Since the heat is trapped in here, it would contribute to higher temperatures. *Have a nice day!!*
This is a guess, but I think it could be the lack of limiting factors.