Humanity's early fire-starting tools may have been dangerous because in the text is says,<span> "It could be lighted only by hard rubbing, and it sputtered and threw fire in all directions." This is dangerous because it would spew fire in all directions and if you think about it, the fire would hit something and then that thing would catch on fire. Lets say you were using the match inside your house. When you strike the match, a spark flies onto the wood floor and your house goes up in flames and you are stuck inside the house with no exit or escape. This may or may not happen, but because of the fire not being contained, there was a chance that you would be harmed.</span>
Answer:The author develops the idea that humanity'y early fire-starting tools may have been dangerous because in the text it states, " It could be lighted by hard rubbing, and it sputtered and threw fire in all directions." when something is thrown in an uncertain direction it becomes very dangerous and unpredictable. When the thing being thrown is able to cause more damage just on its own it becomes dangerous all in its self with the inevitable being scary.Because you don't know what it could hit or if it can become uncontrollable in an instant. ion: