Using preference curve, explain when an economy is said to be trapped

Indifference curves are used to demonstrate how a consumer makes his choice between different goods according to the utility that he attributes them.

Indifference represents the points where a consumer exchanges quantities of good A for good B, and its utility does not change.

The economy will be trapped when consuming it is no longer consuming goods, or at least not in a way that exceeds production demand

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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.