Answer :
Final answer:
Yuri Gagarin was the first human to orbit Earth, followed by Alan Shepard and John Glenn.
Explanation:
Yuri Gagarin was the first human to orbit Earth on April 12, 1961, as part of the Soviet space program. Following Gagarin, Alan Shepard became the first American in space on May 5, 1961, with his suborbital flight, and John Glenn was the first American to orbit Earth in February 1962.
Learn more about Yuri Gagarin and early space exploration here:
https://brainly.com/question/39233955
Answer: A. Yuri Gagarin
Explanation:
Gagarin was the first human from the Soviet Union to orbit the Earth. His space vehicle orbited the Earth at the speed of 27,400 kilometers per hour and the flight lasted for 108 minutes.