which situation best represent a proportional relationship

kelly sold 2 rings for $3 and 3 rings for $6
lawrence packed 27 plates in 9 boxes and 81 plates in 27 boxes
jeff ran 4 miles in 20 minutes and 6 miles in 24 minutes.
francesca placed 8 pencils in 2 cases and 16 pencils in 8 cases.

Jeff ran 4 miles in 20 minutes in 6 miles in 24 minutes is the proportional answer

Gravity is a force of attraction that brings all things (including terrestrial bodies) with mass towards one another. This brings, the sun, the planets and their moons together in orbit. On earth the gravity brings all things with mass towards the center of the earth. This explains the reason why all things thrown up falls back down.