Human habitation is the main reason or causes of deforestation.
The human race !
commercial logging
wildfire
Population growth / clearing of lands for agricultural use.
The number one cause of tropical deforestation worldwide is agriculture, specifically for activities like palm oil production, cattle ranching, and soy farming. These industries often involve clearing large areas of forest to make way for these commodities, leading to widespread deforestation in tropical regions.
The vegetation in Brazil is the Tropical Rainforest.
clearing of lands for agricultural use
the number one cause of an engine fire would probably be oil leakage.Source: Experience
The number one cause of collisions on the freeway is following too closely (tailgating).
probably not number one but a huge cause of many deaths
4 hurricanes. This has happened twice. There was one occasion when there were 5 tropical cyclones (tropical depression, tropical storm, or hurricane), but no more than 2 were hurricanes at any given time.
One country with a tropical rainforest along the equator is Brazil. The Amazon rainforest is one of the largest tropical rainforests in the world and spans a significant portion of Brazil's territory.