Give one example of its occurrence on Earth. Convection is the process of hot materials rising and cool materials descending. It occurs in Earth's troposphere, where it helps get rid of heat trapped by the greenhouse effect. Convection also happens in Earth's mantle. Turn it off and you reduce plate tectonics.
Convection also happens the the core, where it helps form the magnetic field.
The semimajor axis of Jupiter's orbit is 780 million km. If Jupiter's mass were very much smaller, orbital resonances between Jupiter and asteroids in the asteroid belt would not be important. Explain the most significant consequence logically for the most credit. Jupiter's gravity would not nudge asteroids into elliptical orbits, eventually making them collide with each other or other planets. The asteroids would probably have accreted into a planet.