The more people that came to a certain place gained its population, while the people that left decreased the population .
Answer:
Nature
Explanation:
Air pollution harms plants and animals and even contaminates water – it stifles tree and crop growth, causing leaves of tree species to blacken and wither.
A Dichotomous key works by <span>using a set of questions to remove choices until you get down to the one choice you are looking for. It works by :</span><span>
1) a series of choices that leads to the correct name of the organism
2) at each step in using the key, the used is given two choices; each choice
leads to another question until the item is identified</span>
Answer;
-Applied research
Explanation;
-Applied research is a methodology used to solve a specific, practical problem of an individual or group.
-This type of research plays an important role in solving everyday problems that often have an impact on life, work, health, and overall well-being. Applied research is used to find solutions to everyday problems, cure illness, and develop innovative technologies.