Alec saw footage of a landslide on the news. He saw rocks falling from the side of a mountain, with some of them smashing into each other and breaking apart. Alec witnessed A.
erosion and weathering.

B.
erosion and compacting.

C.
weathering and compacting.

D.
weathering and sedimentation.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation:

answer; both surfaces of the membrane are nonpermeable

maybe because its impossible for balloons to lift a whole entire house.