Because moving water wears away cliff
20% sames more like the answer than the other three. But I'm considering that it could be 50%, but, it doesn't convince me. So, I'd say: C. 20%
The correct answer is 1, tight junctions. Tight junctions are the junctions seal adjacent epithelial cells in a narrow band just beneath their apical surface. They contain a network of claudins and other proteins. They limit the passage of molecules and ions through the space between cells.
I believe the answer is the primitive organic molecules were formed in an oxidizing atmosphere in the primordial soup.
C. would be the correct option among alll of these
