An example would be the Battle of Gettysburg. Grant, nicknamed "the butcher", threw wave after wave of Union soldiers at the confederate lines causing mass casualties for both the union and the separatists. But, he knew the North had more man power than the South and could effectively use this tactic to win the war combined with the Union's greater infrastructure and supply lines.
''A remnant or a trace of an organism, such as a skeleton or a leaf imprint embedded and preserved in the Earth's crust, are examples of fossil evidence.''
Fossils are left overs from the living organism, both parts of them and traces by them. Fossils are used by scientists to recreate the past of the Earth, the life on it, how did they lived, how did they look, the environment, whole ecosystems...
Answer:
it has to be b because of the other ones are wrong
B. Embankments, packed dirt and or stacked stone placed to keep water out.