**Explanation:**

**Shortage of food and water can result in a famine.**

Famine is a severe shortage of food that leads to widespread hunger and starvation. It occurs when the available food supply is insufficient to meet the needs of the population. This can be caused by several factors, including natural disasters, war, economic instability, and poor agricultural practices.

**Natural Disasters**

Natural disasters such as droughts, floods, and tsunamis can significantly impact food production and access to clean water. Droughts, for example, can lead to a lack of water for irrigation, resulting in crop failure and reduced food production. Floods can destroy crops, contaminate water sources, and displace communities, making it difficult for people to access food and clean water. Tsunamis can cause similar devastation, wiping out entire coastal communities and disrupting food production and distribution systems.

**War and Conflict**

War and conflict can also contribute to food shortages and famines. During times of war, agricultural infrastructure may be destroyed, making it difficult for farmers to grow crops and raise livestock. Conflict can also disrupt transportation networks, making it challenging to distribute food to affected areas. Additionally, populations may be forced to flee their homes, leaving behind their sources of food and water.

**Economic Instability**

Economic instability, such as high levels of poverty and unemployment, can also contribute to food shortages. When people are unable to afford nutritious food, they may suffer from malnutrition and other health issues. Economic instability can also lead to political instability, further exacerbating food shortages and increasing the risk of famine.

**Poor Agricultural Practices**

Inadequate agricultural practices can also contribute to food shortages. For example, over-reliance on a single crop can make communities vulnerable to crop failure if disease or pests affect that crop. Lack of access to modern farming techniques and technologies can also limit food production. Additionally, poor land management practices, such as overgrazing or deforestation, can degrade soil quality and reduce agricultural productivity.

In conclusion, a shortage of food and water can result in a famine. Natural disasters, war and conflict, economic instability, and poor agricultural practices can all contribute to food shortages and the widespread hunger and starvation characteristic of a famine.