Which question might a historian ask to investigate what happened? How many people are in the photograph?
Where did the sinking take place?
Who took this photograph?
Why did the military use this kind of ship?

Where did the sinking take place?

Explanation:

For a historian, there are certain aspects of the text or information that can authenticate and provide true facts. The most important questions that can ascertain the authenticity of the information are to ask the "who, what, where, how, and why" of the text or information.

And in 'investigating' the photograph of the sinking of the USS Maine in 1898, the question that a historian might ask to investigate is to ask "where the sinking take place". This will provide him/ her the detail about the ship's sinking location and thus help in further investigation of the event.

Thus, the correct answer is the second option.

2: albert einstein was one of several german scientists who the allies defeat the nazis

explanation:

mark brainliest and have a great day!

the correct answers are the following

a proxy war which functioned as a training field for wwii

republican democratic goverment

national side, leaded by the fascist general franco

the spanish civil war took place between 1936 and 1939 and was fought after a military coup undertaken on the 17th july 1936 by a group of generals that had seceeded from the spanish republican army, under the leadership of general franco, and who aimed to expel the democractically-elected republican goverment from power.

this war became a proxy war in which european powers tested their military equipment. on one side, urss and mexico supported the left-wing republican spanish goverment, while nazi germany and fascist italy supported the national fascist side.

franco managed to win the war in 1939, with the significant contribution of the foreign military support, and became the dictator of spain until his death in 1975.

explanation:

mark brainliest and have a great day!