Answer:
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.
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Answer:
1. FIRST BATTLE OF THE MARNE
At the start of the First World War, Germany hoped to avoid fighting on two fronts by knocking out France before turning to Russia, France’s ally. The initial German offensive had some early success, but there were not enough reinforcements immediately available to sustain momentum. The French and British launched a counter-offensive at the Marne (6-10 September 1914) and after several days of bitter fighting the Germans retreated.
Germany’s failure to defeat the French and the British at the Marne also had important strategic implications. The Russians had mobilised more quickly than the Germans had anticipated and launched their first offensive within two weeks of the war’s outbreak. The Battle of Tannenberg in August 1914 ended in German victory, but the combination of German victory in the east and defeat in the west meant the war would not be quick, but protracted and extended across several fronts.
The Battle of the Marne also marked the end of mobile warfare on the Western Front. Following their retreat, the Germans re-engaged Allied forces on the Aisne, where fighting began to stagnate into trench warfare.
The opening months of the war caused profound shock due to the huge casualties caused by modern weapons. Losses on all fronts for the year 1914 topped five million, with a million men killed. This was a scale of violence unknown in any previous war. The terrible casualties sustained in open warfare meant that soldiers on all fronts had begun to protect themselves by digging trenches, which would dominate the Western Front until 1918.
Explanation:
Answer:
The city-states changed in 2000 BCE as they became weak and easy to conquer by outsiders.
Explanation:
A city-state controlled its towns and villages, but city-states fought with one another over resources and territory.
Around 2000 BCE, the region became weak due to conflict, which made it easy to conquer by others. The change implemented regarding the economy and government after the capture. People were allowed to work, trade and do businesses along with paying taxes. The rulers of the city-states became more powerful, began to exercise their authority over others, and established dynasties.

The answer is...
B. Northeast
Hopefully, this helps you!!

An important scientist at the time, besides, those who were mentioned was Copernicus - A.
Spartacus was just a slave general in the Roman republic.
Rousseau was a philosopher.
Plato was a philosopher as well.
The correct answer for that reason is Copernicus, he was an astronomer and a major figure at the time.