How did Siddharth Gautam enlightened?Why did he name the fig tree as bodi tree?

Explanation:

Bodhi tree, also called Bo tree, according to Buddhist tradition, the specific sacred fig (Ficus religiosa) under which the Buddha sat when he attained Enlightenment (Bodhi) at Bodh Gaya in Bihar, India.

Enlightenment. One day, seated beneath the Bodhi tree (the tree of awakening) Siddhartha became deeply absorbed in meditation, and reflected on his experience of life, determined to penetrate its truth. He finally achieved Enlightenment and became the Buddha.

it should discride this whale so it shouldnt be that hard

imparadis't in one anothers arms  

the happier eden, shall enjoy their fill  

of bliss on bliss, while i to hell am thrust,  

where neither joy nor love, but fierce desire,  

among our other torments not the least,  

still unfulfill'd with pain of longing pines;  

yet let me not forget what i have gain'd  

from their own mouths; all is not theirs it seems:  

one fatal tree there stands of knowledge call'd,  

forbidden them to taste: knowledge forbidd'n?  

suspicious, reasonless. why should their lord  

envie them that? can it be sin to know,