All of the following are methods to improve the communication of your key messages except:
focus on three clear points
direct questions to the audience at key intervals
include a relate and humorous story
fill the slides with images and animations

Fill the slides with images and animations

Explanation:

Focus on the necessary points during a communication really helps well so that the receiver receives it in the right way.

Putting questions in equal interval or whenever necessary will help the presenter in attracting the attention of the audience which improves communication

Including related humorous story is essential because it communicates ideas with fun

Filling the slides with images is not going to help if it is not related to the topic that has been taken for discussion. But if it is related slides then this is valid.