is fast moving air or wind that blows horizontally through the upper layers of the troposphere, generally from west to east. It develops where air masses of different temperatures meet. The greater the difference in temperature, the faster the wind speed.

Jet stream

Explanation:

Jet stream is fast moving air or wind that blows horizontally through the upper layers of the troposphere, generally from west to east. It develops where air masses of different temperatures meet. The greater the difference in temperature, the faster the wind speed.

Jet stream has the following characteristics;

- The winds blow from west to east

- The flow often shifts to the north and south.

- They follow the boundaries between hot and cold air.

the answer is c i just put d and i got it wrong so yeah its d