At various times, the nations that comprise the organization of petroleum exporting countries (opec) have restricted the supply of oil to increase their profits. this is an example of: individual actions that have side effects that are not properly taken into account by the market. one party preventing beneficial trades from occurring in an attempt to capture a greater share of resources for itself. some goods unsuitable for efficient management by markets. none of the above.

One party preventing beneficial trades from occurring in an attempt to capture a greater share of resources for itself.

Explanation:

This is an example of one party preventing beneficial trades from occurring in an attempt to capture a greater share of resources for itself. One of the causes of market failure is when a product as important as oil is manipulated by one party to obtain a greater profit. When the nations that comprise the OPEC have restricted the supply of oil to increase their profits is a very good example of one of the reasons why a market can fail.

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.