What do you make of this reality and its quirks?

Hey everyone, taking a breather inbetween exams to ask you the following three questions I have been pondering lately in my spare time, that I can’t find answers to:

1) What is movement? How does it happen? (somewhat touching upon Zeno’s arrow paradox though not quite)
2) What is temperature? How is it we feel it regardless of what the object, substance etc. we come in contact with is?
3) This last one is a bit philosophical perhaps: Why did life evolve to cannibalize itself? What does the “survival of the fittest” point towards, in terms of its ‘goals’ (supposing a self-organizing system like that oscilates towards something…)?

I’m curious what you all think about these. Cheers!