The International Space Station (ISS) is able to stay in orbit for many years, since it flies at such a high altitude that atmospheric drag is non-existent it is far less vulnerable to micrometeorite strikes than any previous space station it is periodically reboosted to higher altitude by Russian spacecraft docked to it it is periodically boosted to higher altitude by its own on-board thrustersThe only ride that astronauts can currently take to get to the International Space Station is on board the Russian Soyuz Space Shuttle Chinese Shenzhou Space-X Dragon capsule

International Space Station is the largest spacecraft orbiting Earth. It is placed in a low Earth orbit with a perigee altitude of 418 km and an apogee altitude of 422 km. This orbit decays at a rate of 2 km per month. It is orbit for around 22 years.The ISS stays in orbit even though its orbit decays at a rate of 2 km per month is because of the periodic boost it receives from the visiting spacecraft. The spacecraft which docks with ISS will have surplus fuel which is used to adjust the orbit. Since the station is in low orbit there is atmospheric drag and Earth's gravitational pull which causes the decay. Also the propulsion system onboard the ISS is mostly used to avoid space debris in the lower Earth orbit. Thus the correct option is Option 3.The capsule used to reach ISS is the Russian Soyuz capsule but during 2020 SpaceX's Dragon capsule was used to reach ISS and is the first private spacecraft to do so.

Answered: The International Space Station (ISS)…

		it flies at such a high altitude that atmospheric drag is non-existent
		it is far less vulnerable to micrometeorite strikes than any previous space station
		it is periodically reboosted to higher altitude by Russian spacecraft docked to it
		it is periodically boosted to higher altitude by its own on-board thrusters

		Russian Soyuz
		Space Shuttle
		Chinese Shenzhou
		Space-X Dragon capsule