What does sunlight symbolize in a raisin in the sun

 Sunlight is a familiar symbol for hope and life, since all human life depends on warmth and energy from the sun.

Sunlight is usually used to symbolize Hope & Life, since the old apartment had so little of it.

A lyric poem is a poem which express the feelings and emotions of the author.
A Haiku poem is kind of Japanese poem consisted of only 3 lines, in which the middle one is 7 syllables, while the 2 others are 5 syllables.
A couplet poem is a poem in which each 2 lines rhymes and have the same number of syllables.
A sonnet poem is a poem consisted of 14 lines, 10 syllables each.

The author of the poem is clearly describing what he sees, what he listen, his feelings and emotions. So we can say it's a lyric poem.

Hope this Helps! :)