Answer:
Optimistic.
Step-by-step explanation:
Being optimistic is staying positive and hopeful even in the face of imminent failure. It is the ability to look for the good in things, to look at the bright side of things rather than just be negative and give up.
In the given excerpt from Dave Eggers's "Zeitoun", the main protagonist Abdulrahman Zeitoun is asking or rather pleading with everyone to keep on doing the good work. He emphasized that they had overcome the worse of all, the hurricane and now, they can build a better place. The hurricane may have destroyed their lives and homes, but they are capable of rebuilding everything, if not better. He insisted that "progress is being made [even if] it's so slow...". His insistence that they keep on working despite the huge amount of work needed and the slow rate of progress all show his optimistic nature.