Final answer:
Backward to requirements is the best type of requirements trace link to use when customer needs include business objective requirements change during or after development, as it allows you to identify the impacted requirements.
Step-by-step explanation:
The best type of requirements trace link to use when you want to identify which requirements will be affected if customer needs include business objective requirements change during or after development is Backward to requirements. This trace link starts from the business objective requirements and traces backwards to identify the impacted requirements. By using backward traceability, you can determine the dependencies and potential effects of changes to the business objective requirements on other requirements.