Answer:
Knight service, in the European feudal system, military duties performed in return for tenures of land. The military service might be required for wars or expeditions or merely for riding and escorting services or guarding the castle.
Explanation:
Probably 1, however I can see why that would be a tiny bit confusing.
Building walls protects from incoming invaders(at least back in the day), creating armies, makes a force to go and fight to protect the people, and what was the other one? Oh yea, moving to a safer place.
Doing that would mean making invasions less likely, and making your people feel and be safer.
Hope this helps.
Im pretty sure but not a hundred percsnt sure, I believe it is c, but it might be b.
The hard snow walls of an igloo are good insulators that keep in body heat and also the heat generated by oil lamps, these are known as qulliq. This is why traditional igloos are commonly made out of snow rather than ice and this is because solid ice does not retain heat as well as blocks of compressed snow. In addition, the walls block the wind, which is often so bitter that it can make freezing temperatures feel many degrees colder. Also, insulation capabilities actually increase a few days after construction. Body heat and sun exposure cause the inside of the igloo to melt ever so slightly. When the igloo is unoccupied during hunting expeditions, the melted snow freezes over, turning into ice. Gradual thawing and refreezing turns the entire structure to solid ice, making it not only superstrong, but warmer than ever.
Answer:
Prince Henry contributed to global exploration:
He opened a navigation school and funded expeditions.
Explanation:
Prince Henry completely dedicated his entire life and riches to sea navigation. In particular, he paid for many ships to voyage across the ocean to discover Asia and Africa. Above all, he initiated the sharing of knowledge of geography and navigation by opening a navigation school. In addition, Prince Henry is credited with the invention of the oceangoing caravel ship, including the perfection of the critical navigational instrument called the astrolabe.
