Answer:
How invisible particles can be observed in outer space. ... We call this invisible mass dark matter since it cannot reflect light. Gravitational effects are only way we can detect its presence.
The advantage of applying learning approaches to the study of personality is how individuals alter their behavior as a result of rewards, disciplines and other experiences in life, a method known as learning. Classic behaviorists center firmly on obvious behavior and therefore the ways in which it will be littered with rewards and punishments.
He is playing the role of the "Burglar" he is the one that is to find the Arkenstone for the dwarves and sneak past Smog the dragon.
