The name for such a hole is "caldera" which is a word of Spanish origin meaning "a pot" or a "cooking pot" (thing of cauldron!) - and this word is used because it resembles the shape of this hole.
Often the Calderas are filled with water forming lakes and often there is an island in the middle of the water.
The railroad tracks are parallel, because they go the same direction and don't intersect
The answer is A.
Zionism is a national movement dedicated to re-establishing a Jewish national homeland in Palestine. It emerged as a response to the antisemitic campaigns happening in the late 19th century. Theodor Herzl is the founder of the Modern Zionist movement.