Rhetorical Structure in Environmental Speech

Read the following excerpt from a speech about environmental conservation:

"To preserve our planet for future generations, we must take immediate action. Our forests are disappearing, our oceans are polluted, and our wildlife is at risk. Each of us has a role to play. By reducing waste, conserving water, and choosing sustainable options, we can make a significant impact. Together, we can create change!"

Based on the structure of this excerpt, which organizational strategy is primarily used to convey the urgency of environmental conservation?