Identifying Tone in a Community Letter

Read the following excerpt from a letter written by a local leader detailing community efforts to improve public safety:

'Despite the challenges we face, our community has come together like never before, demonstrating resilience and unity. Volunteers have stepped up in impressive numbers, helping to organize neighborhood watch programs and improve communication with our police department. It is inspiring to witness such commitment, and I firmly believe these efforts will lead to a safer environment for all.'

Which of the following options best describes the tone of the excerpt?