Answer: plant tours
Explanation: operators work and keep it going and do not do tours
Sanderson's cross-national study indicated that international migration increases overall levels of human development. Thus, the correct option is A.
<h3>What is Migration?</h3>
Migration may be defined as the movement of people from one place to another in search of resources better than their native one.
International migration increases the overall standards of human development because it initiates new opportunities and trade aspects of people of one country to another.
It also leads to improved human development outcomes in major areas like education, health, and finance.
Therefore, the correct option for this question is A.
To learn more about International migration, refer to the link:
brainly.com/question/25198210
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Answer:
I believe that is correct. You're smart. :) stay safe!
Genetic variation is the variation in the DNA sequence in the genome of an organisms. Organisms of a species have similar characteristics but they are not identical due to genetic variation. Genetic variation is important in the survival and the adaptability of a given species of organism. Therefore, in this case lack of genetic variation necessary to adapt to change in the environment will lead to extinction of the fish species that lacks the variation.