Describe the features of the indus valley civilization which make it unique in the history of ancient India

The development of urban centers, script on seals, advancement of technologies and urban sanitation systems.

Explanation:

The development of urban centers, script on seals, advancement of technologies and urban sanitation systems are the features of the Indus valley civilization which make it unique in the history. They developed urban centers where people comes from surrounding areas for trade. They also used advance technology of measuring length and mass. They also formed the world's first known urban sanitation systems.

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.