Answer:
In the picture, England, (or United Kingdom) is occupying countries and geographical regions in order to expropriate all of its resources. Some countries or islands are closer to its hands (Ireland) which means it basically became the part of UK. Other countries are trying to mantain its sovereignty.
Step-by-step explanation:
Imperialism is a political doctrine which made the United Kingdom as wealthy as it is today. It is a first empire who conquered most of the world in XVIII and XIX century. Imperialism basically means colonization of land and extraction of its resources. It also means putting those countries in dependent position from UK, because the ties between these countries are so strong that if UK were about to leave these lands, they would soon be bankrupt and desent into civil war. This is why the political anti-colonial and national movements were important in those countries in order to free themselves from the chains of UK. In the terms of resources, labor power and slavery also had an enormous importance for the development of UK, and later USA.