Catapedophobia
Tree Phobia
If you mean to say the fear of public and open spaces, it's called Agoraphobia.
Someone who is always nervous doing a presentation may be grouped with those who fear public speaking; thus, such a person might be called 'laliophobic' or 'glossophobic' (afraid of the spoken word, speaking, public speaking). More simply, if also less sophisticatedly, one could be called a 'presentation-fearer.'
Such a person is usually called a 'coward'.
Because they are afraid of getting hurt.
No, this is your life. You can do what you want with it. Dont make someone think your someone else.
Paranoia.
Someone who is afraid of flies is referred to as a "musophobia" or "myiophobia." These terms derive from Greek roots, where "myia" means fly. This specific phobia can lead to significant anxiety or distress when encountering flies or even thinking about them.
I am only aware of a phobia concerning trees in general; it is called Dendrophobia.
When someone calls you "yellow", they are saying that you are afraid, craven, cowardly, etc.
Fear of travel: An irrational and unreasonable fear of travel is called agoraphobia.