Answer:
Organism, Organ System, Organ, Tissue, Cell
A jet stream forms high in the upper troposphere between two air masses<span> of very different temperature. The greater the temperature difference between the air masses, the faster the wind blows in the jet stream.
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So "Differences in temperature between two air masses" is the answer
I think the answer is Honeymoon phase. Post disaster periods are usually divided into four phases. These includes; Heroic phase, Honeymoon phase, Disillusionment phase and Reconstruction phase. Heroic phase occurs immediately after the disaster strikes. Honeymoon phase occurs immediately in the first few days after the disaster. Disillusionment phase, the community and the survvors are already getting tired and impatient. Reconstruction phase, it is the long term phase of the disaster where we must manage the expectations of the public regarding the ongoing recovery process.