Which best explains how gravity contributes to the formation of layers in protoplanets? O Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials.
O Gravity causes materials to undergo radioactive decay, which produces heat and leads to the melting, sinking, and rising of materials.
O Gravity absorbs heat, which cools materials and causes them to sink and rise.
O Gravity releases heat into space, which cools materials and causes them to sink and rise.