Engels work, relating to unfavorable working conditions, relates directly to the time and place of the diary´s entry, and for that reason, it could be used as a firsthand personal illustration of Engel´s thesis. Nevertheless, it should be treated as merely one example, one single viewpoint, upon a problem whose context and dimensions are far greater than one man´s perspective; that is to say, the entry diary can work as one historical source amongst the many more that a reliable argument should employ in trying to support and fundament Engel´s thesis.
This document would be a perfect source to support Engels's claims about the working class in England. Engels argued that the working class all over the world was being exploited. They worked long hours for very little pay. Moreover, they lived and worked in crowded and filthy conditions. The only people who profited from this arrangement were the business owners and producers that hired these people. Therefore, the diary would accurately describe the problems that Engels outlined.
<span>In this instance the cotton candy would be a trigger. In psychology a trigger is a stimulus (sound, smell or texture) that causes a memory tape or flashback. Often times triggers are associated with traumatic events, however this is not always the case.</span>
The stabilizing selection is a result of the decrease of the population and causes genetic variation due to the natural selection.
The directional selection of the genetic variation shifts to a new phenotype and on exposure to the environmental changes and both of these can lead to the natural selection and contribute to the variation of the population.
