Final answer:
Balochistan covers about one-fifth of the land area of Pakistan and is the largest political unit, representing approximately 44 percent of the total land area. Characterized by harsh terrain, it has a sparse population. Pakistan's geography includes various environmental challenges such as deforestation and earthquake risks.
Step-by-step explanation:
Balochistan covers about one-fifth of the land area of Pakistan. This region, which accounts for approximately 44 percent of the country's total land area, is the largest political unit within Pakistan. Balochistan's landscape is characterized by barren terrain, sandy deserts, and rocky surfaces, and is situated to the west of the Indus River. It acts as a bridge between the Middle East, Iran, and the rest of Asia. Despite its size, Balochistan has a sparse population, with inhabitants primarily residing in mountain valleys where water is available.
The geography of Pakistan is diverse, with the country facing several environmental challenges such as deforestation, water pollution, and frequent earthquakes due to its location on a tectonic plate boundary. Additionally, regions like Punjab are known for their fertile agricultural land and high population density, owing to the ample fresh water and food production from its river valleys.