Answer:
Assuming you mean credit as in a credit card, it basically means to spend money that you don't have yet. When you use credit, the bank pays the store for your purchase. In return, you then have to pay back the bank. You can pay it all back at once, or make payments over time. However, the bank will charge you interest depending on how long it takes you to pay it back.
Answer:
Built in the 1960s, the High Aswan dam allows Egypt to control the flow of the Nile. I hope this helps