Is sex an activity of youth that typically fades away in middle age?
a. yes, because the frequency of intercourse declines with age
b. no, because couples enjoy a newfound sexual enjoyment and freedom
c. yes, because there is both a female and male climacteric
d. no, because hormone treatments are available for both females and males

correct option is c. Yes, because there is both a female and male climacteric

Explanation:

sex is activity of youth and that fades away in middle age because hormonal changes

as we know that many hormonal changes is occurs during this phase of life

so in women menopause is occurs

and in male testosterone hormone declines

so that fades away by the age

so here correct option is c. Yes, because there is both a female and male climacteric

answer: populations of walruses and polar bears will decline

explanation:

you put it

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