In the reaction that builds a fat, groups react with groups.
A. sulfhydryl; carboxyl
B. hydroxyl; phosphate
C. phosphate; amino
D. hydroxyl; carboxyl
E. carboxyl; amino

D. hydroxyl; carboxy

Explanation:

A fat molecule is produced by the dehydration reaction of a hydroxyl group of glycerol backbone with the carboxyl group of fatty acid. Dehydration synthesis means this reaction will produce a water molecule as byproduct.

The glycerol backbone bound to three fatty acids through an ester linkage is produced in this reaction. This compound is called triglyceride (simplest lipid) and that's why minimum 3 fatty acids molecules are necessary to make a fat molecule.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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more words for this could be abiotic and biotic

abiotic: living organisms within an ecosystem

biotic: non-living organisms within an ecosystem