Final answer:
Malignant tumors are the type of tumor most likely to be cancerous and can invade and damage neighboring tissues. They can also spread to other parts of the body.
Step-by-step explanation:
Malignant tumors are the type of tumor most likely to be cancerous. Unlike benign tumors, malignant tumors have no limits to their growth and can invade and damage neighboring tissues. Cells from malignant tumors can also break away and spread to other parts of the body.