Consider a thin spherical shell centered on the proton, with radius r1 and infinitesimal thickness dr1. Since the shell is so thin, every point within the shell is at essentially the same radius from the proton. Hence the amount of electron charge within this shell is equal to the electron charge density rho(r1) at this radius multiplied by the volume dV of the shell. What is dV in terms of r1?

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

i think the answer is a, hope this : )