Explanation

The Red Line refers to the disputed boundary in the Sir Creek area between Pakistan and India.

Additional information:

• Sir Creek is located between Pakistan & India
• It is located along the southeastern border of the Sindh province of Pakistan and the western border of the Gujarat province in India.
• This area is called the Greater Rann of Kutch, a marshland situated along the Arabian Sea.
  
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• Sir Creek is important to Pakistan because: It is environmentally important to prevent coastal wetlands from degradation
  
• About 90 km2 of the lake comes under Pakistan, whilst the majority of the lake i.e. 210 km2, lies within India.