Which of the following causes objects to orbit the sun? a. the planets' rotation b. the sun's gravity c. the gravity of nearby planets d. the planets' mass

In order for an object to be in orbit around a larger object.  The larger object my exert its gravity on the smaller object.  Like a planet around the sun, or a satellite around the Earth or Moon.  This answer is B

This is the answer: body 1 + engine 2