Dark spots on the photosphere are known as
a. the corona.
b. solar wind.
c. sunspots.
d. the chromosphere. user: which type of electromagnetic radiation cannot be focused?
a. gamma rays
b. ultraviolet
c. infrared
d. x-rays

the darkspots on the photosphere are known as : C. sunspots this phenomenon happened because reduced surface temperature cause a concentration of magnetic fluc. The type of electromagnetic radiation that cannot be focused is : A. gamma rays gamam rays caused the electric fluctuation in the field to be much faster than the electron distribution, making it unable to be focused

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.