Question

1. the four outer planets are made of...

less - dense gases but with larger size and mass
dense, solid rocky and metallic materials
dense gases and rock interiors
less - dense lava and noxious gases

Explanation:

The four outer planets (Jupiter, Saturn, Uranus, Neptune) are gas/ice giants. They consist of less-dense gases (e.g., hydrogen, helium) compared to inner rocky planets, and they have much larger size and mass. Dense solid materials describe inner planets, dense gases/rock interiors are not accurate for their composition, and less-dense lava/noxious gases are irrelevant.

Answer:

less-dense gases but with larger size and mass