Explanation:

- Constructive thinking: This is critical thinking that leads to problem-solving and idea development. It benefits from exposure to diverse perspectives and information.

- Option 1: Avid reading: This suggests having a keen interest or enthusiasm for reading but doesn't specify the breadth or type of material read.

- Option 2: Narrow reading: This involves reading within a limited scope or subject, which may not foster diverse thinking.

- Option 3: Extensive reading: This suggests reading a wide range of material, which is more likely to broaden perspective and enhance constructive thinking.

- Option 4: Brief reading: This denotes short or quick reading sessions, which might not allow for deep or broad understanding.