What type of tumor does not invade nearby tissues?

A benign tumor is characterized by its non-invasive nature. Unlike malignant tumors, which have the ability to invade surrounding tissues and metastasize to other parts of the body, benign tumors typically remain localized to their original site. They may grow in size but do not invade other tissues or spread to different areas. This characteristic is what differentiates benign tumors from malignant ones, which demonstrate uncontrolled growth and can lead to serious health complications due to their invasive potential.

Metastatic tumors are another category where cancer cells spread from their original site to different parts of the body, further distinguishing them from benign tumors. Neoplastic tumors encompass a broader category that includes both benign and malignant tumors, but not all neoplasms are invasive. Thus, the specific defining trait of benign tumors is their lack of invasiveness, making them the correct answer for this question.