because
A behaviorist theorist, such as B.F. Skinner, would be most likely to agree with this statement. They believe that behaviors, like working hard, are reinforced by positive stimuli, such as a good grade, leading to motivation to continue that behavior.
Engage in foraging, pastoralism, and simple agriculture
lower productivity and reduced quality.
The likely word is quality (a trait, or well-made).
Soil quality is likely very good
Engage in foraging, pastoralism, and simple agriculture.
The most important job for Paleolithic people was likely hunting and gathering food for survival. This required coordination, skill, and knowledge of the environment to secure resources for sustenance.
Poor air quality
When the brand and quality is well known or good, people are most likely to buy it.
Quality education is for everyone. Poor people often cannot afford the best quality of education, so they are less likely to get it than rich people.
The word sought is likely loquacity (quality of being talkative, or loquacious).
Asset quality ratios determines the quality of loans of a financial institution. If the ratio is high the more at risk the loans are. The lower the ratio, the less likely the loan would be at risk.