One indicator of whether or not a source is credible is to investigate the author, specifically the author's credentials. Another way to think about the credibility of authorship is to consider and investigate whether or not the author:

1.)Made a profit on selling their book
2.)Has published a best seller.
3.)is in a "position to know."
4.)Has published a book on another topic.

answer; /// i believe that the correct answer is (a) making presentations;

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.

the works of justice saves things/people

the works of service things/people

explanation:

that's the best i can word it. hope it !