Okay this gets a little complex but follow along hitler was great at inspiring people and was overall very charismatic this allowed him to go up the ranks of the national socialist German workers party he also formed many para military units that allowed him to intimidate many politicians and forcing his enemy’s to stay out of his way. He also may have burned down the German Parliament building and blamed it on the communist so that he could get parliament to pass the enabling act that allowed him emergency powers and he quickly grew his powers from there is this what you wanted? Have a great day (:
Well,
The answer would be the number 3
why? because in the beginning when Ferdinand de Lesseps, a french engineer who built the swiss canal decided to create one in the isthmus of Panama due to its ideal location and width to save a lot of time and money on travels, they brought over from France workers and machines, used to create the swiss canal previously, but due to the clay soil and the tropical conditions they quickly broke, forcing workers to do most of the work manually.
Also, due to the heat and the still water, mosquitoes carrying different diseases like malaria and dengue, swarmed the area biting and infecting the workers, ultimately killing most.
Making them give up the whole project.