Will Mark Brainliest 3. Name three new weapons or methods of warfare first used during World War I. What effect did the introduction of new technology have on the war?

Three new weapons first used in WW1 were Tanks, Gas, and portable machine guns

Explanation:

TANKS - Tanks allowed for allied soldiers to cross the barren wasteland of no-mans-land, which effectively allowed for the war to end sooner. Tanks also shaped the whole of world war 2

GAS - Gas made people question what was human about war, and were did it go too far. Gas also gave the axis a advantage over the allies, and set a massive anti-gas production into affect (like making gas masks)

portable MACHINE GUNS - this invention has shaped war as we know it. The ability to kill multiple people in one clip increased the number of people killed in the war.

hope this helps :)

the answer is a. the declaration of independence.

u.s.a

china

india

and

japan