Which type of tumor is characterized as benign and originates in the bone?

The type of tumor that is characterized as benign and originates in the bone is an osteoma. Osteomas are neoplasms that typically arise from the bone's surface and are usually slow-growing. They are well-circumscribed and composed of compact or cancellous bone, making them a type of bone tumor that does not exhibit aggressive behavior or metastasize.

This benign nature means that they often do not present the same risks or symptoms associated with malignant tumors. This distinguishes them from other options listed. For example, liposarcoma is a malignant tumor that arises from adipose (fat) tissue, and hemorrhoids are a condition involving swollen blood vessels in the rectum or anus, not tumors. An embolism refers to a blockage in a blood vessel caused by an embolus, which is unrelated to tumor pathology. Thus, osteoma is the correct answer because it is specifically defined as a benign bone tumor, encompassing the characteristics highlighted in the question.