The mood of the passage is the one that follows:
B- surprise and joy.
Mrs. Lacey smiles at the other character, and it is clear she's being true, since right after it she shakes her head in order to show her inability to understand the other character's action of bringing an ant with him. Mrs. Lacey is not angry or upset, but feeling in the same way mothers do when their kids do weird things they are not able to understand due to generation gap, to their kids' immaturity, among other things.
Speaking outline fits that description.
The utterer of the prayer asks for the most horrible things possible--"tear their soldiers to bloody shreds with our shells; help us to cover their smiling fields with the pale forms of their patriot dead; help us to drown the thunder of the guns with the shrieks of their wounded, writhing in pain; help us to lay waste their humble homes with a hurricane of fire; help us to wring the hearts of their unoffending widows with unavailing grief; help us to turn them out roofless with little children to wander unfriended the wastes of their desolated land in rags and hunger and thirst, sports of the sun flames of summer and the icy winds of winter, broken in spirit, worn with travail, imploring Thee for the refuge of the grave and denied it -- for our sakes who adore
Mama's plant in A Raisin in the Sun is a symbol for her dream of someday having her own house and garden. Mama has had this dream for a long time, and she hopes to put money down on a house so that her family can move out of their cramped apartment.
