Answer:What causes the Northern Lights? activity on the surface of the Sun.
Can you predict when and where there will be Northern Lights? Yes but with less certainty then whether predictions.
Explanation
The sea allowed them to lend themselves out to other countries/groups as soldiers also it helped their economy. Is that all you need?
The snail would decrease because that’s it’s source of food.
From the Nile to the Indus valley, all of the early civilizations formed on river banks. This was because the rivers like the Nile provide fertile land to grow crops, raise cattle and if more than one civilization forms on the banks of the same river,
