The correct answer is - hospitals.
The infrastructure of a country is a set of built objects where services are offered, and people work, or are using them in their daily lives for their activities. In the infrastructure of a country also fall the schools, colleges, and universities, roads, airports, administration buildings, factories etc. They all have someone that works in them, something that offer, and are used, to and by the general public, and the more developed the infrastructure is, it usually means that the more developed the country itself is as well.
While most African Americans serving at the beginning of WWII were assigned to non-combat units and relegated to service duties, such as supply, maintenance, and transportation, their work behind front lines was equally vital to the war effort.
His results gave the first evidence that atoms were made of smaller particles. Specially, he proved the existence of negatively charged sub-atomic particles known as electrons.
As European states extended their influence over seas, AGU political argument for imperialism gained prominence. Even if colonies were not economically beneficial, imperialist held that it was crucial for a political and military reasons to maintain them. Some overseas colonies occupied strategic sites on the worlds see lanes, and others offered harbors and supply stations for commercial and naval ships dock. Add the kids for imperialism sought to gain these advantages for their own states in equally important to deny them to rivals.
