The best hook to replace the weak one in the paragraph is:
A strong hook is a very captivating piece of information that is meant to draw the attention of the reader to the subject being discussed. The weak hook is the one that says that the first world war was "the costliest global conflict in terms of both funds and human lives."
This hook could have captured the reader's attention if it mentioned exact figures that were related to the war. The option that really includes a strong hook is the first one.
Learn more about strong hooks here:
https://brainly.com/question/27841054
#SPJ1