Which of the following conditions can invalidate a real estate contract?

The choice indicating that all of the mentioned conditions can invalidate a real estate contract is indeed accurate. Each of the conditions listed plays a significant role in the enforceability of a contract.

Lack of consideration refers to the absence of something of value being exchanged between the parties involved. In general, for a contract to be enforceable, there must be a mutual exchange of consideration; if one party does not provide this, the contract can be deemed invalid.

Failure to meet listing agreements can also lead to invalidation, particularly in situations where specific terms outlined in the listing are not adhered to. When these terms are not followed, it can compromise the basis of the agreement itself, leading to potential disputes or nullification.

Changes made without mutual consent of both parties can invalidate a contract because any modifications must typically be agreed upon by all parties to the original contract. If one party unilaterally makes changes, it undermines the agreement and can render it unenforceable.

Conclusively, all these conditions highlight the importance of mutual agreement, consideration, and adherence to the terms within a real estate contract, thus making the selection that includes all these factors the correct choice.