The beginning of language and the ability to pretend signal the beginning of what piaget calls the stage .
A. preoperational
B. secondary
C. formal operational
D. concrete operational

depression is an ongoing sadness\lack of motivation. you feel and feel like its never going to get better. you're so sad to the point you think of death.

anxiety is an ongoing feeling of paranoia\ feeling like everyone is watching you and making fun of you. you get nervous easily and feel like the room is spinning.  

yes, they cause death every year. its a long, exhausting battle. only few make it through as sad as it sounds.

explanation:

which ever one is showing doing the same exercise in time intervals such as 30 seconds or a minute several times.