B and c
Its because heavier objects have a higher gravitational force
I know why farmers use fertilizers..... to provide nutrition for the plant
I'd say protein synthesizer.
A. Longer
The shortest wavelength on the left side is Gamma rays. The longest are radio so as you move to the right, it gets longer.
the radiations that are used to treat cancers are of the gamma type. primarily emitted from cobalt-60 (a radioactive isotope). and it is more controlled than other radiation exposures. i.e. solar radiation which is not controlled.
hope that this helps.
