Answer:
The answer is: d) companionate
Step-by-step explanation:
It's says that passion has declined, so this is the reason why it can't be consummate or intimated, as consummate in marriages means the act of having sex, which is basically the opposite, and well, intimated, could mean privately or sexually close, but it's not specifying here, so it's neither one. While there's nothing romantic mentioned here, whatsoever so this is why it isn't romantic. Companionate, is an adjective to describe equal companions, which after 55 years, I guess this is what is more noticeable in a marriage, companionate.