2.
1. The elephant was upset because he was lost.
2. The bird flew high into the sky and looked for the other elephants.
3. The elephant never forgets his friends.
4. a
Объяснение:
4.
One day I saw a young elephant. There weren't any other elephants around, and the elephant was lonely and upset. Suddenly I knew what the problem was. The elephant was lost. I flew high into the sky and looked for the other elephants. I saw them near a river and went back to the young elephant. 'Come with me!' I said. I flew in front and the elephant followed. Finally, the elephant joined the others near the river and I left.
Twenty years later, the elephant was in a different part of the jungle and saw a man with me in his net. I was old, but was still beautiful and colourful. Suddenly, the elephant recognized me. The elephant ran towards the man and made a loud noise. The man dropped the net in surprise and I was free. 'Why did you help me?' I asked. 'Because I never forget my friends,' said the elephant.
A satellite is any object that moves in a curved path around a planet. The moon is Earth's original, natural satellite, and there are many man-made (artificial) satellites, usually closer to Earth. The path a satellite follows is an orbit, which sometimes takes the shape of a circle.
To understand why satellites move this way, we must revisit our friend Newton. Newton proposed that a force -- gravity -- exists between any two objects in the universe. If it weren't for this force, a satellite in motion near a planet would continue in motion at the same speed and in the same direction -- a straight line. This straight-line inertial path of a satellite, however, is balanced by a strong gravitational attraction directed toward the center of the planet.
