..............4 is D and 6 is A
The mudflows are very dangerous and they have a great destructive power. They appear after a heavy rainfall on places that are steep. The mudflows are very fast and sudden occurrences, so usually people are caught unprepared. A mudflow is a mixture of water and lot of ground/mud, and all sorts of debris, which also contributes to it to be more dangerous.
1,203,375 different species of animals on earth and 1,589,361 different species of plants on earth (so your answer is more)