What is the name of a natural volcanic glass, a rock used in the past to make it very sharp blades for spears and arrows

MRCORRECT has answered the question

Explanation:

Obsidian is a naturally occurring volcanic glassformed as an extrusive igneous rock. Obsidian is produced when felsic lavaextruded from a volcano cools rapidly with minimal crystal growth.

Obsidian

Obsidian was used to make knives, arrowheads, spearpoints, scrapers, and many other weapons and tools. Once these discoveries were made, obsidian quickly became the raw material of preference for producing almost any sharpobject.

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.