The sun is a significant factor that to support life. which of the following earth-sun relationships is not true?

a. the sun's gravity keeps earth from flying off into space.
b. earth is the 4th planet from the sun, which is a perfect distance to utilize the sun's energy.
c. the sun is key to dynamic processes on earth, like weather, climate, and cycling of water.
d. if earth were any farther from the sun, more ice would form reflecting more heat and making the planet similar to mars.