A. It prepares to fight danger or run from it.
That statement is true
Aerobic exercise such as swimming and running will burn a lot of calories from our body
And in order to burn calories, our body need supply of oxygen.
That's why our heart tend to beat really fast when we do Aerobic exercise, it's because our heart need to pump a lot of blood to deliver oxygen to the muscles
Answer:
Barely a week has elapsed since scientists in Botswana and South Africa alerted the world to a fast-spreading SARS-CoV-2 variant now known as Omicron. Researchers worldwide are racing to understand the threat that the variant — now confirmed in more than 20 countries — poses to the world. Yet it might take scientists weeks to paint a more complete picture of Omicron, and to gain an understanding of its transmissibility and severity, as well as its potential to evade vaccines and cause reinfections.
Heavily mutated Omicron variant puts scientists on alert
“Wherever I go, everyone says: tell us more about Omicron,” says Senjuti Saha, a molecular microbiologist and director of the Child Health Research Foundation in Dhaka, Bangladesh. “There is so little understanding of what’s going on, and that’s true, even for scientists.”
it makes the nervous system relax
Explanation:
it is used to catch wild animals.
