Final answer:
Community service project or environmental volunteerism is the term used to describe activities such as campus clean-ups and planting trees, which aim to improve the environment and strengthen community engagement.
Step-by-step explanation:
The term for the activity where a chapter participates in a campus clean-up day, including picking up trash, planting trees, and repainting a campus sign, is commonly referred to as a community service project or environmental volunteerism. These initiatives are often organized by student groups and are aimed at improving the local environment while also fostering a sense of community and civic responsibility. Earth Day is an example of an event that supports these activities, which began in 1970 and encourages participants to engage in service projects such as trash removal from natural areas.
Related activities such as the ones mentioned like the Habitat for Humanity fundraising drive, and various art projects like the "positive signs project" also illustrate the commitment to positive change and environmental stewardship. Students and governmental programs play significant roles in maintaining and enhancing neighborhood and campus aesthetics, contributing to ecological restoration. By participating in such projects, students gain leadership experience, learn the value of teamwork, and see firsthand how their efforts can benefit both the environment and their communities.