Answer:
A malignant tumor is more dangerous because it can grow quickly. It may grow into or spread to other parts of the brain or to the spinal cord.
Step-by-step explanation:
Tumors can be benign (noncancerous) or malignant (cancerous). Benign tumors tend to grow slowly and do not spread. Malignant tumors can grow rapidly, invade and destroy nearby normal tissues, and spread throughout the body.