Explanation:

Introduction:
Water is one of the essential elements to sustain life on earth. It is present in different forms like oceans, rivers, lakes, glaciers, etc. There are different sources of water, and based on their origin, they are classified as natural and man-made sources.

Natural sources of water:
Natural sources of water are the ones that are present in nature without any human intervention. They are as follows:

1. Groundwater: It is the water that is present beneath the earth's surface and can be accessed through wells and tube wells. It is a renewable source of water, and the recharge of groundwater depends on the rainfall and percolation of water through the soil.

2. Surface water: It is the water that is present on the surface of the earth in the form of rivers, lakes, and oceans. Surface water is the primary source of water for human consumption, agriculture, and industries.

3. Rainwater: It is the precipitation that falls on the earth's surface in the form of rain, snow, sleet, or hail. It is a natural source of freshwater and is collected through different methods like roof rainwater harvesting, surface runoff harvesting, etc.

Man-made sources of water:
Man-made sources of water are the ones that are created by humans for their use. They are as follows:

1. Tap water: It is the water that is supplied to homes, offices, and industries through a network of pipes. Tap water is treated and disinfected to make it safe for human consumption.

Odd one out:
The odd one out among the given options is option 'B' (Tap water) because it is a man-made source of water and not a natural source of water like the other options. Tap water is created by humans, whereas the other options are present in nature without any human intervention.

Ground water, Surface water and Rain water are natural sources of water but Tap water is an unnatural source of water.