"of insects" is an adjective phrase because it's a prepositional phrase that acts as an adjective. It modifies the word "group"; In other words, "of insects" is used to describe the word "group".
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?
Its emphasises the writers message and keeps it constant, andstuck in the readers mind, so therefore the reader will want to read on due to the fact that they'd want to find out more about what is actually happening and it gets them hooked.
