What are the four main parts of soil?

What is the reason for the “scramble for africa”?

Alow pressure system is formed when an air mass cools over a cool surface and sinks. true or false

Plz asap can someone find the answer or the mark scheme or anything plzzz you : ) ‘it's perfectly understandable that hundreds of millions of people around the world live close to volcanoes’ use evidence to support this statement. (6 marks)