What should Yi focus on including in her toast for her grandmother's 90th birthday?

Yi should focus on including funny and moving anecdotes about her grandmother and various audience members because these personal stories create an emotional connection with the audience. Anecdotes allow for the expression of warmth, love, and shared experiences that highlight the grandmother's character and the impact she has had on her family and friends. This approach makes the toast memorable and engaging, fostering a sense of joy and nostalgia that is fitting for a celebration of such a significant milestone.

In contrast to the other options, simply stating facts about her grandmother's life might be informative but lacks the personal touch that makes a toast special. A brief introduction of each family member could divert attention away from the central focus of the toast, which should be on the grandmother herself. Summarizing recent family achievements might not resonate as much in the context of honoring her grandmother's life and experiences, as it shifts the focus away from the celebratory tone intended for a milestone birthday.