Which Countries have sent a spacecraft to mars this year?

For the first time in human history, a fleet of three probes deployed from the UAE, China and the US set sail in July 2020 and took the seven-month interplanetary journey to Mars. The spacecraft from the UAE and China managed to enter Mars orbit on February 9 and 10, respectively.

Explanation:

answer; economic order quantity;

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it