Tides are caused by the specific alignment of the Moon, Earth, and Sun.
When aligned a certain way the the gravitational pulls basically share and add on to each other creating tidal waves.
An example of a certain alignment would be spring tides, which happen during a New or Full moon.
Examples: Boat sailors must watch out for tides and make sure to plan their sailing journeys according to the tide. They don't want to be caught against a tide, especially small board sailors.
Also fisherman keep note of tides since some sea life rely on tides for survival and feeding or some fish simply follow the movement of the tides. Fisherman use tides as an indication of when it'd be best to go fishing.
B. The Himalayans separate India from the rest of Asia. One way to remember is that China and India fought a war in 1962, and they both have troops up guarding the McMahon Line to this day. India and China are in a superpower competition. China builds dams which impacts India's rivers, increasing the potential for hostilities. Adding to their tensions is the fact that China just made friends with Pakistan. It's very complicated and it involves every nation in Asia. If you remember that the Himalayans are an important barrier between these two countries, you're good to go.
The Red Square is a Square in Russia, in Moscow, the capital of Russia.
It is famous for being next to the Kremlin, where the President of Russia resides, which is sometimes the name used for the Russian government and Russia generally.
Many military parades take place on this Square, so it is often seen on the television.
