I'm not 100% sure this is correct but I would say that the answer is b) the south pole. Unlike most other continents that had already been mapped extensively, the coastline and geography of Antarctica was not fully understood until around the mid 19th century, and before that was amongst a part of the world that went unmapped for a while because it had not yet been properly discovered and/or recorded.
movement back and forth at a regular speed
<span>a bowl-shaped area that forms around a volcano's central opening so True</span>
.They get about the same amount of radiant energy year-round. The angle of the sun at the equator is more consistent, whereas in higher latitudes, such as in Canada, the sun's angle changes more significantly from summer to winter.