Final answer:
Mexico has Colima on its Pacific coast, which is the least populous state with a robust tourism industry due to its beaches and tropical climate.
Step-by-step explanation:
The country that has Colima on the Pacific coast and is the least populous is Mexico. Colima is one of the 32 federal entities, also known as states, of Mexico and it lies on the country's southwestern coast.
Often overshadowed by more populous coastal states, Colima stands out due to its beautiful beaches and tropical climate, which attract tourists. Although Mexico's Pacific coast is not a major economic core area compared to other regions in North America, Colima contributes to the national wealth through tourism and agricultural exports.
In addition, the country's west coast is profoundly influenced by the Pacific tectonic plate movement, which significantly affects geological formations and natural events in the area.