Final answer:
The last Grand Morning Assembly in school discussed the topic of Climate Change and Sustainability, emphasizing the need for understanding and addressing climate change.
Step-by-step explanation:
During our last Grand Morning Assembly, the topic of discussion was Climate Change and Sustainability. It was an important topic that focused on the impact of human activities on the environment and the need for sustainable practices to mitigate climate change. The assembly emphasized the importance of understanding climate change and taking individual and collective actions to address this global issue.