Your project is an agricultural-based project that deals with plant irrigation systems. You have discovered a byproduct in your project that your organization could use to make a profit. If your organ

Enhancing increases the probability or impact of an opportunity but does not ensure it occurs with certainty; seizing an existing byproduct is more definitive than merely enhancing.

Opportunistic is not a defined PMBOK risk response strategy; it is not a recognized term in standard risk management frameworks.

Positive is not a risk response strategy; it describes the nature of the risk (opportunity) rather than the action taken to address it.

Exploit is the positive risk response used when the project team wants to ensure an opportunity definitely occurs, leaving no chance it will be missed. Seizing the agricultural byproduct to generate profit is a deliberate action to capture the opportunity with certainty, which matches the definition of exploiting - taking active steps so the positive event is guaranteed to happen rather than just more likely.