What best defines internationalism?
the build up of armaments
political and social reforms
active involvement in world affairs

Internationalism refers to the idea that we all are, and should be, part of a broader community, not just the nation or the state. Therefore it has focused in the areas of universal government and an universal language. As you can see, the correct answer is "active involvement in world affairs". It seeks cooperation among the different countries and their people.

Although it is a  concept that is under constant discussion, this common points of view often appear in it.

elon musk, ceo of spacex, a startup space company is planning to head to mars by 2023. nasa is planning to go to mars at around 2025. both are just for a basic colony.

the teacher i would like to have must be a kind, caring and understandable teacher. she should be interactive with us and always plan fun activities to in our studies. she should be a teacher who would correct our mistakes when we do something wrong and guide us if we are weak. she should always be strict if we do something bad but must be praising us when we do something good. she she not take any as her favorite in her class but take everyone as her favorite.

(i hope this will u if there is something send me a reply)