Questions

Sport played on horseback is called as Polo. It is the national sport of Iran.

The sentence that states the main idea of the paragraph is called as Thesis or the topic sentence.

Satellites orbit the earth at a speed of 28,000 kmph.

Satellites that are further away actually travel slower. The International Space Station has a Low Earth Orbit, about 400 kilometers (250 miles) above the earth's surface. Objects orbiting at that altitude travel about 28,000 kilometers per hour (17,500 miles per hour).

All automobiles uses satellite communication channel for their GPS devices.

humming Bird is the smallest among all the birds

The only active volcano in India is situated in Andaman-Nicobar islands.