Final answer:
The correct use of colons and semicolons in the sentences provided is option (a), COLONS: *I gave you the spray bottles for one reason: to clean the windows. SEMICOLONS: *I want to wear the red shirt; my favorite color is red.
Step-by-step explanation:
The correct option for using colons and semicolons in the provided sentences is option (a). The colon is correctly used after an independent clause to introduce a related idea, which in this case is the reason for giving the spray bottles - to clean the windows. The semicolon is used properly to connect two independent clauses that are closely related - the desire to wear the red shirt and the fact that the speaker's favorite color is red.