Thank you for posting your question here at brainly. I think the answer is the second one which is "Natural geographic barriers prevented major cultural development in these civilizations." I hope the answer will help.
It was "access to water" that directly helped early humans develop agriculture, since these water sources were crucial for the irrigation needed to grow the crops, as well as feed the animals.
<span>The Schlieffen Plan’s objective was to
launch an attack on France so that they can take the French out and this would
force Russia to accept their terms. The
problem was that was poorly organized and this led Britain to get involved in
the conflict that started World War I.</span>