Esperanza looks at the trees for guidance of strength. Even though they could die at any given moment without all the nutrients they need, they still preserve in the concrete and draw roots to the ground to get what they need to survive. They also show how not to give up by saying "keep, keep, keep". She will strive if only she believes she can.
The trees also relied on each other. As stated in the text, "Let one forget his reason for being, they'd all droop like tulips in a glass, each with their arms around the other." They follow the 'all for one and one for all' kind of motto. They got each others back and if one falls they all do. This shows Esperanza that she can also trust people around her.
-Theresa, Kirsten, Judeline, Alexus-