I believe the answer is Birds of North America
Birds of North America basically a comprehensive encycplopedia consisted of various types of birds that live in the region of Canada and United states.
This books contains the combination of works from more than 800 authors and regarded as the Best <span>ornithological works ever completed.</span>
A possible alternative to slavery that I think the colonists could have used to solve the labor shortage is for them to give the laborers more compassion and rewards. Instead of trying to threaten or discriminate them, why not treat them fairly and that colonists would get all their commitment to work and could encourage more laborers to join.
<em>Answer:</em>
<em>main effect of eating</em>
<em>Explanation:</em>
<em>Hypothesis: </em><em>In research methods, the hypothesis is described as a "proposed explanation" for a specific phenomenon. It requires the scientific method to prove it or test it. Different scientists, researcher, or experimenter generally base their hypotheses on the former observations that can't be explained satisfactorily with already available theories.</em>
<em>It is referred</em><em> to as an explanation that a researcher tests or measures via experimentation or study.</em>
<em>As per the question, the researcher expects to observe the main effect of eating.</em>
<span>Social Darwinism is the use of the natural selection or survival of the most apts individuals ideas, proper of the natural science, in the society. Then, Social Darwinism promotes competition and innovation as the basee for the best growing and health of the societies. Then the answer is the option d. </span>