A group of organisms that can reproduce to produce fertile offspring (babies that can reproduce). A)Biosphere
B)Community
C)Population
D)Ecosystem

Población  

Explanation:

Puesto que no se especifica que individuos realizan la acción podemos deducir que habla de los seres en general, así pues , de todas las definiciones creo que la población es la más acertada.

i would think it's dendrites

explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.