Class systems differ from caste systems in that one’s status in a class system may, to some extent, be , while in a caste system it is not. a. achieved b. economic c. social d. ascribed

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.

answer; caravan;

a)apline.     glad to ! : )