The concept of a government sharing power between a central government and smaller regional governments is called... A. Confederalism
B. Democracy
C. Federalism
D. A republic

Federalism (c)

Explanation: federalism is the system of government by which power is shared among central and regional government

answer; i believe the correct answer is (crops);

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.