Final answer:
The correct answer to complete the analogy is (d) enervate.
Step-by-step explanation:
The correct answer to complete the analogy is (d) enervate. In the given analogy, ubiquitous suggests something that is present everywhere, just like omnipresence. Similarly, weaken should have a word that complements its meaning, which is to make something or someone less strong or powerful. Among the answer choices, (d) enervate is the best fit, as it means to drain or weaken someone's energy or strength.