Choose two categories from the River Valley Civilizations sheet. Then, write an essay comparing and contrasting the four civilizations in those two categories. For example, you could choose to compare and contrast the governments and the writing systems of the four civilizations. Provide specific information in your essay. Be sure to explain both how the civilizations were alike, and how they were different, in those categories. You can use the River Valley Civilizations sheet as a reference.

they charge for servic mark me brainliest

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.