Final answer:
The Mediterranean Sea touches three continents: Europe, Africa, and Asia, thus it qualifies as a sea that meets the specified criteria.
Step-by-step explanation:
The question is how many seas in the world touch at least 3 continents. From the provided information and general geographical knowledge, two major bodies of water are of note. First is the Atlantic Ocean, which touches North America, South America, Europe, and Africa. However, in terms of seas, the Mediterranean Sea touches Europe, Africa, and Asia. The second is the Indian Ocean, in proximity to Africa, Asia, and Australia, but it itself is not a sea. Fundamental geographical understanding does not provide sufficient information on any other sea that touches three continents. Therefore, in reference to seas, the Mediterranean Sea would be the significant example fulfilling the criteria.