Source- beginning of a river
mouth-end of a river
estuary- area there a river meet the sea or the ocean
tributary-river/stream that flows into another stream, river, or lake
One big difference between the two is that Saudi Arabia has very abundant oil reserves, which are the basis of its economy, and Yemen and Oman, despite being next to it, have very small oil reserves.
This also influences how rich the countries are, although in the recent years Oman is catching up on Saudi Arabia and it's not very poor.
Answer: just for the points sorry
Explanation:
<span>It is a result of the township-and-range survey system. It is also referred to as rectangular survey system. It has been established in order to set boundaries for land parcels which is usually 24 miles square in area. This system of rectangles can specify and locate a land with meridians from north to south and baselines from east to west. </span>
Answer:true
Explanation: Seventy-five percent of Canada's population resides in a narrow 150-kilometre band pushing up against the U.S., with close ties south of the line.