After an experiment, it is important to write down your or summary of what you learned.

After an experiment, it is important to write down your conclusion or summary of what you learned.

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.