Final answer:
France is the country with the southern parts of the Alps extending to Switzerland and Italy, and it also features Mont Blanc, which is part of the Alpine range.
Step-by-step explanation:
The country that has the Alps extending from the south of it to Switzerland and Italy is France. The Alpine region in France includes parts of the Alps that run towards the east, featuring Mont Blanc, the highest mountain in the Alps.
France is also bordered by the Pyrenees to the south, which separate it from Spain, and extends to encompass various physical landscapes, including coastal plains and highland regions.