Final answer:
The event depicting the tension between Walter and Ruth in Act I, Scene 1 of 'A Raisin in the Sun' is when Ruth denies Travis 50 cents and Walter gives him a dollar, revealing underlying conflicts in their relationship.
Step-by-step explanation:
The event that shows tension between Walter and his wife Ruth in Act I, Scene 1 of A Raisin in the Sun by Lorraine Hansberry is d. when Ruth will not give Travis 50 cents and Walter hands him a dollar. This moment highlights the differing perspectives and underlying financial stress between the couple, as Ruth's initial refusal and Walter's decision to give more money than asked underscores the power dynamics and their conflicting attitudes towards money and parenting within the household.