In a population of deer in one year, six deer were born, five deer emigrated, three deer were killed by predators, and one deer immigrated. What can be determined from this information?

Add the population increases: 6 deer were born and 1 immigrated, for 7 added. Subtract the losses: 5 emigrated and 3 were killed, for 8 lost. The population therefore decreases by 1 deer, so the best choice is “Population growth is decreasing.”

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