Check this site out it helped me A LOT!
https://en.wikipedia.org/wiki/European_migrant_crisis
The answer to your question is A
<span>most lakes were formed from : melting glaciers
When glaciers melt, the ice that cover it will started to turn into liquid. The force of Gravity will bring this liquid onto the holes on the surface of earth and filling it with water, which is the lakes that we are commonly see</span>
