Final answer:
Lago views Desdemona as a tool to harm Othello, Cassio and Desdemona share a deep friendship, but it's not romantic. Cassio genuinely cares for Desdemona's well-being and safety, although others might mistakenly interpret his kindness as romantic love due to their close friendship.
Step-by-step explanation:
Lago's plan to get Cassio to drink more wine is motivated by his scheme to discredit him and secure his demotion. Cassio is known not to handle his alcohol well, so by drinking more, he becomes intoxicated and behaves unprofessionally.
In the story, Lago sees Desdemona as a means to destroy Othello. He wants to use her to bring about Othello's downfall because Othello loves her. On the other hand, Cassio and Desdemona have a close friendship that is not romantic. Cassio genuinely cares for Desdemona and is loyal to Othello. His concern for Desdemona's safety and well-being stems from their deep friendship.