More people compare themselves to other's "highlight reels," there's less face to face interaction, and more time spent on social media means less time for ther activities.
The variable is the group that was given caffine, because thats what the doctors manipulated. They possibly altered the natural memory of the participants by giving them caffine. A more specific variable could be how much caffine each participant is given and what time are they given it.
Answer: it is a plant-like organisms like algae
Explanation:
"<em>Urbanization as more and more people moved to cities to find work. It led to our modern ideas of consumer society, as people were able to begin to choose different brands to buy, based on everything from the price, to quality, to designs, patterns, and colors. Companies began to make different models of things in order to attract more buyers, so it could be seen as the beginning of modern capitalism. It led to an increase in technology, as more and more machines were invented and used to help increase the efficiency at which products were made, leading to lower prices and more availability. Also, it was the first time that a source of power, other than muscles power (human or animal,) was used to create products. It led to a more connected world, as new technology like trains, steam engines, and railroads that were designed to more quickly transport goods, were also used to better connect people. It helped establish the industrialized nations (mainly England and America) as the dominant world powers. It would eventually lead to more rights for workers and the concept of the modern working conditions we have, although at the start this would not have been true. It helped women begin to break the cult of domesticity, as more and more young, unmarried women got jobs.</em>" according to Michael P.

Answer:
Telomeres, the ends of chromosomes, shorten as we age, but this process can be slowed through exercise
Explanation:
The following that demonstrates how aging can be influenced by heredity is "Telomeres, the ends of chromosomes, shorten as we age, but this process can be slowed through exercise"
Telomeres are known to be pieces of junk DNA which are usually found at the end of end of chromosomes. The length of telomeres shorten with age.They become shorter and shorter and gets to a point when the cells cannot divide without losing some pieces of DNA. When it shortens, it affects lifespan and health of an individual.
According to the genetic theory of aging, it is seen that genes determine lifespan.
Studies has revealed that exercises helps to lengthen telomeres and also helps the heart and lungs to function well.