‘What is the question?’

“Trees are the answer!” Peter Schertz, right, leads a group of pre-kindergartners in a chant while celebrating the planting of one of eight trees on Wednesday at Needham Elementary School in an annual event, “Trees Are the Answer.” Paula Mills, one of the event’s organizers, said Schertz and numerous Needham parents and volunteers have planted 26 maples, elms and other trees at the school during the last three years.