Four metals were kept in contact with each other. the table below shows the initial temperature of the metals.

metal initial temperature
a 30 °c
b 42 °c
c 25 °c
d 16 °c

from which metal will heat flow into all the other metals?
metal a
metal b
metal c
metal d

The Answer is : B

Explanation:

The answer is B because the warmest one transfers heat to the cooler ones.

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.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.