Final answer:
Drought is caused by a lack of rainy weather, leading to water shortages. Human activities like deforestation can worsen drought conditions. Adequate rainfall during good weather improves agricultural supply and water availability.
Step-by-step explanation:
A lack of rainy weather causes drought, as drought is a period of unusually low rainfall leading to water shortages. When there are extended periods without sufficient rainfall, it can result in a decline in water supply for agricultural, personal, and industrial use. Human activities like deforestation can exacerbate drought conditions since trees help to add water vapor to the air. Conversely, times of good weather, marked by adequate rainfall, can increase the supply of agricultural products and generally improve water availability.