Answer:
Dreams deferred for too long, he feared that they were beginning to dry up like a raisin in the sun.
The absolute phrase is "Dreams deferred for too long".
Step-by-step explanation:
An absolute phrase is a group of words in a sentence, that modify the independent clause. It is usually composed of a noun and some other words that modify the noun. They can come before, in between or after the independent clause.
In the sentence above, the absolute phrase tells us the reason for the man's fears. His fears was because his dreams were deferred for too long. This absolute phrase modified the independent clause in the sentence.