Answer:
I have re uploaded the map with the areas explored by each country.
Spain - we can see that Spain explored the totality of Mexico, and that is why Mexico is still a Spanish-Speaking country. Spain also explored the Southwestern United States (Texas, New Mexico, Arizona, Nevada and California) which used to be part of Mexico as well. It also explored Florida and Cuba.
France - France colonial center was what is now Quebec, and that is why this Canadian region still speaks French. The French also explored the Midwest and the Mississippi Valley, and founded the city of New Orleans.
England - The English explored the East Coast, where the thirteen original colonies were founded. Despite being the smallest geographical area explored compared to the other two countries, it was the most succesful because it became the most populated.
