What has led to the disappearance of many of the world's natural temperate grasslands? 

A)  Increased tornadoes and dust storms 
B)  Increased fires 
C)  Increased pests like locusts 
D)  Increased human agriculture

Temperate Grasslands

Expansive areas of grassy fields found in regions with moderate temperatures throughout the year, often used for grazing and agriculture.

Human Agriculture

The practice of cultivating soil, producing crops, and raising livestock for human use and consumption.

Tornadoes

Violently rotating columns of air touching the ground, usually attached to the base of a thunderstorm, known for their potential to cause significant destruction.