To get her attention. Eragon was trying to speak to her, but she was not listening, being a tree. Saphira was attempting to get her to listen. It worked.
Of all that we know so far, the Menoa tree knows eragon wants to kill Galbatorix, so like he other woman who made Eragon's new sword Brisingr, she takes the fact in Eragon will defeat Galbatorix.
We're not quite sure, even Eragon doesn't know, but I guess we'll all find out in the fourth book!
Anything with a mouth can bite
a tree-though sometimes it whistles in the wind a sleeping dog
burn it burn it burn it burn it burn it burn it
Yes. Not really great as firewood, but you can burn it.
Burn it.
You light it on fire...
vaginas
Yes.
You burn it
No!