What is the difference between weight and mass?

Mass is based on the number of molecules contained in an object and is constant. Weight is the gravitational force acting on a mass and it depends on the local gravitational pull; e.g. object weighs less on Moon than on Earth.

the one with the highest speed

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.