The more your action and thought are allied and . . . . . ., the happier you grow.

invincible
divergent
integrated
unravelled

The correct answer is C. integrated.

When your actions and thoughts are aligned, you are more likely to feel confident and in control of your life. This can lead to a greater sense of happiness and well-being.

Option A, invincible, is incorrect because it suggests that you will be immune to problems or challenges. This is not necessarily the case. Even when your actions and thoughts are aligned, you will still face difficulties in life. However, being able to approach these challenges with confidence and clarity can make a big difference.

Option B, divergent, is incorrect because it suggests that your actions and thoughts will be different or even contradictory. This can lead to confusion and uncertainty, which can make it difficult to be happy.

Option D, unravelled, is incorrect because it suggests that your actions and thoughts will be chaotic or disordered. This can also lead to confusion and uncertainty, which can make it difficult to be happy.

In conclusion, the correct answer is C. integrated. When your actions and thoughts are aligned, you are more likely to feel confident and in control of your life. This can lead to a greater sense of happiness and well-being.