The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.
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i) Population density
ii) Under population
iii) Over population
Population density is the number of people living in a square mile. In the future, economically developed nations may not have enough money to take care of older citizens because of underpopulation. In low-income nations, overpopulation is one reason for low standard of living.
Water heat at a different rate than land because water has a higher capacity for storing heat than does land surfaces.Hope this helps !
Add a picture, this is a question that needs to be seen because they may try putting the countries in random places.
Is this question have a multiple choice? If so what are they?
