Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface? which statement must be mentioned in explaining why amphipathic molecules line up at a water surface? nonpolar groups repel water. nonpolar groups attract one another.

Nonpolar groups repel water.

Explanation: Amphipathic molecules line up at a water surface because the polar end of each molecule remains in contact with water grouping together, while the nonpolar ends are grouped by repelling water.

most sediment washes or falls into the river as a result of mass movement and runoff. other sediment eroded from the bottom or sides of the river.

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence