One way is that the sun is heating up the world causing droughts and causing the water level to rise to cause floods
Answer: savanna
Explanation:
Savannas have an extensive dry season and consequent fires. As a result, there are relatively few trees scattered in the grasses and forbs (herbaceous flowering plants) that dominate the savanna
Uneven distribution of wealth, increased population leads to crowded urban areas which could be unsanitary, immigration can cause cultural conflicts
P waves travel the fastest