Nations responded to threats to their allies by mobilizing their militaries.
By the time that anyone took back the decision to go to war, it was already too late because militaries got ready so quickly. It was like lighting a fuse, it happens so fast, it is almost impossible to stop.
The enlightenment was a period of new ideas and world views fed by a better understanding of the world and our place in it
Answer:
By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments.
Explanation:
It would be B. A household consisting of a mother and father and their children. It would be a basic social unit.