Often, waterfalls form as streams flow from soft rock to hard rock. This happens both laterally (as a stream flows across the earth) and vertically (as the stream drops in a waterfall). In both cases, the soft rock erodes, leaving a hard ledge over which the stream falls
D is the answer hope this helped
Pizza - The sun's energy helped make the pizza because the various ingredients required sunlight, either directly, or indirectly. For example, the cheese is made from cow's milk, and the cow's milk comes from a cow who eats grass (presumably), and the grass feeds off of the sun's energy through photosynthesis. Thus, the cheese is indirectly made with sunlight. Also, the grains used to create the flour used to make the dough used sunlight to grow. Finally, the tomato sauce is made from tomatoes, which are a plant that required sunlight to grow.
I only did one example, but I hope you can make another one with the information I provided yourself! Good luck. :)
<span>cholestrol is part of sterols / steroids which is one of the 4 classes of lipids
cholestrol characterized with 4 fused carbon rings, like all sterols do
other sterols are sex-trait hormones like testosterone etc.
other lipid groups are fats (glycerol and fatty acids), phospholipids
(phosphate head and faitty acid tails), and waxes (contain alcohol
group) </span>
