**Water Scarcity Classification**

Water scarcity refers to the situation where the demand for water exceeds the available supply. It occurs when there is insufficient water to meet the needs of a region's population and ecosystems. In order to classify each situation as suffering from water scarcity or not, let's analyze the given scenarios:

**a) Region with high annual rainfall:**

In this situation, the region receives a significant amount of rainfall annually. This implies that there is a relatively abundant supply of water. However, it is important to note that water scarcity is not solely determined by the amount of rainfall. Other factors such as water management, infrastructure, and population demand also play a crucial role.

- Classification: Not suffering from water scarcity

**b) Regions having high annual rainfall and large population:**

Although these regions receive high annual rainfall, the presence of a large population can put a strain on the available water resources. The increase in population leads to higher water demand for various purposes such as drinking, sanitation, agriculture, and industrial activities. If the water supply infrastructure and management systems are unable to cope with the growing demand, water scarcity can occur despite the high annual rainfall.

- Classification: May suffer from water scarcity

**c) Regions having high annual rainfall but water is highly polluted:**

Even if a region receives high annual rainfall, if the water sources are heavily polluted, it can lead to water scarcity. Polluted water may not be suitable for consumption, irrigation, or industrial uses, rendering it unusable. The pollution can occur due to various factors such as industrial discharge, agricultural runoff, or improper waste management. Consequently, the available water may not meet the demand, resulting in water scarcity.

- Classification: May suffer from water scarcity

**d) Regions having low rainfall and low population:**

In regions with low rainfall, the available water resources are already limited. With a low population, the demand for water is relatively low, which reduces the strain on the available supply. In such cases, the existing water sources may be able to meet the needs of the population and ecosystems adequately.

- Classification: Not suffering from water scarcity

In conclusion, water scarcity is a complex issue influenced by various factors such as rainfall, population, water quality, and management. While high annual rainfall generally indicates a lower risk of water scarcity, the presence of a large population, water pollution, or low rainfall can contribute to water scarcity. It is essential to consider all these factors when assessing the water scarcity situation in a region.

only(c) will suffer from water scarcity