Answer:
The answer is A I have to make this 20 characters long but yeah A
It was a trigger that showed that there were two competing powers in Europe: Russia and Austria-Hungary (and their allies).
Franz Ferdinand was killed by a Serbian separatist and the Austrians wanted him to be punished. On the other hand, Russia supported Serbia is saying that Austrian demands ( to be allowed to search for the culprit inside Serbia) were too much.
This lead to a direct conflict between the two powers (Austria and Russia) and further lead to the war.
The Seven Years' War broke out in Europe while the French and Indian War was being fought in North America.
Hope this helps!
Answer:
Friction between the wheels and track causes energy to leave the system in the form of heat.
Explanation:
Fun fact:
Glaciers and ice sheets hold about 69 percent of the world's freshwater.
