Final answer:
Option B. Only some seal tips must be tightened with a wrench, typically according to manufacturer's specifications and depending on the application. Not all seals require a wrench for tightening as it varies by design.
Step-by-step explanation:
The question, "Which seal tips must be tightened with a wrench?" pertains to a specific procedure in an engineering or technical field, possibly related to mechanical engineering or maintenance practices. In general, whether seal tips need to be tightened with a wrench or not depends greatly on the type of seal and the manufacturer's specifications. For some seals, especially those in high-pressure or critical applications, it is necessary to use a wrench to ensure a proper seal and avoid leaks. These are typically specified by the manufacturer and require careful attention to torque specifications to prevent damage.
However, not all seals require the use of a wrench for tightening. Some may be designed for hand tightening or have a different mechanism for securing them in place. Answering the question directly is challenging without additional context about the type of seal in question. As such, the most accurate response would be option 2) Only some seal tips need to be tightened with a wrench, based on the manufacturer's recommendations and the application in which the seal is used.