Question

which phrase from martin luther king jr.s \i have a dream\ speech contains the strongest emotional connotations?
the long night of their captivity
one hundred years later
the negro lives on a lonely island of poverty
and so weve come here today to dramatize

Explanation:

The phrase "the long night of their captivity" uses metaphor of night and captivity to evoke strong feelings of suffering and oppression. "One hundred years later" is a time - reference with less emotional weight. "The Negro lives on a lonely island of poverty" is impactful but "the long night of their captivity" is more intense in connoting despair. "And so we've come here today to dramatize" is a statement with little emotional connotation.

Answer:

"the long night of their captivity"