What physical change occurs quite frequently in middle-aged men?
a. balding
b. enlargement of the prostate gland
c. increase in the production of testosterone
d. increase in the production of androgen

A) Balding

Explanation:

Balding is the most common pshysical change in middle-aged men.

Generally speaking, men between 35 and 40 years old develop a state of baldness that although it is not aggravated, it is notorious. Some men even begin to lose their hair at an earlier age, approximately 25 years old and older, although in those cases it is very likely that the cause is a genetic tendency.

Normally, after a certain age range (stated above) the hair fiber begins to lose strength and said follicles simply do not allow hair growth so fast as they did when the individual was younger.

B. Enlargement of the prostate gland.

Explanation:

This physical change is known as benign prostatic hyperplasia or BPH and is very common in middle-aged men.

It occurs when cells of the prostate begin to multiply, this squeezed the urethra and limits the flow of urine. One important thing is that it must not be confused with prostatic cancer.

I hope this answer helps you.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

your answer is "the 1950's"