According to the dynamics-of-action model, achievement behavior eventually ends because:Group of answer choicesexternal social pressures mount, often increasing the fear of failure.failure is frustrating, and it thus eventually stimulates a cessation in behavior.the fear of failure typically overwhelms the motive to succeed.once achievement behavior begins, it tends to consume itself.

To answer the question step by step:

1. Understand the dynamics-of-action model: This model explains how different factors influence the initiation, persistence, and cessation of behavior, particularly in the context of achievement.

2. Identify the key components: The model considers internal motives (such as the motive to achieve success and the motive to avoid failure) and external factors (such as social pressures).

3. Analyze the options provided:

   • Option 1: External social pressures mount, often increasing the fear of failure.
     • This suggests that external pressures can lead to an increased fear of failure, which might influence behavior.
   • Option 2: Failure is frustrating, and it thus eventually stimulates a cessation in behavior.
     • This implies that experiencing failure can lead to frustration, causing the individual to stop the behavior.
   • Option 3: The fear of failure typically overwhelms the motive to succeed.
     • This indicates that the fear of failure can become stronger than the desire to succeed, leading to the cessation of behavior.
   • Option 4: Once achievement behavior begins, it tends to consume itself.
     • This suggests that the behavior itself leads to its own end, possibly due to internal dynamics.

4. Evaluate the most fitting explanation: According to the dynamics-of-action model, the cessation of achievement behavior is often due to internal dynamics where the behavior tends to consume itself once it begins. This aligns with the idea that the internal processes and motives involved in achievement behavior can lead to its eventual end.

Therefore, the correct answer is:

• Once achievement behavior begins, it tends to consume itself.