What two substances among four major types of organic compounds are made by living things? A. carbohydrates B. water
C. proteins
D. potassium

The answer is "Carbohydrate" and "Protein"

Explanation:

A solid eating regimen incorporates protein and starches. Why? Since these mixes are two of the primary structure obstructs that make your body. You get these structure blocks from the food that you eat, and you utilize these structure squares to make the natural mixes important forever.

The principle substance parts of living beings are known as natural mixes. Natural mixes are atoms worked around the component carbon (C). Living things are comprised of exceptionally huge particles.

These huge particles are called macro-molecules since "macro" signifies large; they are made by more modest molecules holding together. Our body gets these more modest particles, the "building blocks" or monomers, of natural atoms from the food we eat.

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.