In the decision-making cycle, to execute means to
a. carry out an action that may be dangerous
b. carry out a decision that has been decided.
c. stop the engine
d. start the cycle

B. Carry out a decision that has been decided.

Decision making is viewed as the intellectual procedure bringing about the determination of a conviction or a game-plan among a few elective potential outcomes. It is the way toward recognizing and picking options dependent on the qualities, inclinations, and convictions of the people involved in decision making.  

In this process, the term execute refers to putting the decided plan in live action without bothering about the pros and cons of the consequences.

anticipatory breach of contract

as the name suggests, an anticipatory breach is a breach of contract before the time of performance. so, if a promisor denies to perform his promise and signifies his unwillingness before the time for performance, then it is an anticipatory breach of contract.

and

actual breach of contract

while an anticipatory breach is before the time of performance, an actual breach of contract is on the scheduled time of performance of the contract. an actual breach of contract can be committed either.

hope this . : )