<span>Where are the answers we need to choose from?</span>
Answer:
D. The size of the nuclear family decreases because children move
out of the home.
Explanation:
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Based on the available information and records, the event that happened recently is "<u>the number of snow leopards in Sailugemsky National Park reached 15."</u>
<h3>The available events and the year of occurrence are the following:</h3>
- Mergen Markov returned home to the village of Argut - It occurred in the year 2000
- The Soviet Union collapsed and poaching began to increase in Russia - It occurred in 1991
- Sailugemsky National Park was established as a protected area for snow leopards - it occurred in 2010
- The number of snow leopards in Sailugemsky National Park reached 15 - It occurred in 2020
Hence, in this case, it is concluded that the correct answer is option D.
Learn more about popular events here: brainly.com/question/24200084
