Why do humans waste time? We all do it. We put off tasks we see as boring or procrastinate to avoid having to complete a task. We waste time by over thinking about situations when they require a split second decision. But is this really wasting time? Some situations require a little over thinking so could it be deemed un-nescassary to ponder over other options. You could save money, time and effort by just wondering about a simple 'what if?'. This brings up the question - is wasting time really a waste?
I think the answer is B. Alliteration
Think of it like this
Internal: A force inside yourself
External: A force outside of yourself
So if there an external force, it’s a force from outside so an example would be bullying. You wouldn’t want to go where you are being bullied so that would be an outside force affecting you.