Recent data suggests that heat-generating brown fat is most active in view available hint(s) recent data suggests that heat-generating brown fat is most active in all individuals exposed to cold temperatures obese people exposed to cold temperatures the elderly lean people exposed to cold temperatures p

The most correct answer would be "all individuals exposed to cold temperatures".

Explanation:

Body fat can be divided into white fat and brown fat.  

White fat cells (adipocytes) have a single lipid droplet and this fat is a result of an excess of calories. White fat, when storage around abdominal area, increases cardiovascular risk. Therefore, an obese person has a great proportion of this type of fat.

On the other hand, brown fat has many lipid droplets and mitochondria full of iron, which give its brown color. Brown fat is useful to generate heat, it does so by burning calories. This type of fat can usually be found in adults in the back of the neck and above the collarbone and its amount decreases with age.  

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.