Question

compared to the interiors of jupiter and saturn, the interiors of uranus and neptune have extremely small rocky cores that contribute an insignificant amount of the mass of the planets. are visible because the planets atmospheres are much thinner. indicate that the planets formed in a different planetary system and later became a part of the solar system. have rocky cores that make up a greater fraction of their total mass.

Explanation:

Jupiter and Saturn are gas - giants with large hydrogen and helium envelopes. Uranus and Neptune are ice - giants. Their rocky cores make up a greater fraction of their total mass compared to Jupiter and Saturn. The first option is incorrect as Uranus and Neptune's rocky cores are significant in mass contribution. The atmospheres of these outer planets are not thin enough to make the interiors visible, so the second option is wrong. There is no evidence that Uranus and Neptune formed in a different planetary system, so the third option is incorrect.

Answer:

D. have rocky cores that make up a greater fraction of their total mass.