Select the word-pair that best represents a similar relationship to the one expressed in the pair of words given below.
(The words must be considered as meaningful English words and must not be related to each other based on the number of letters/number of consonants/vowels in the word)
Bacteria: Decomposition

Correct option is B

Bacteria play a crucial role in decomposition, breaking down organic matter. The relationship is "Agent → Process", where bacteria are responsible for decomposition.
Now, let's evaluate the answer choices:
A) Oxygen: Treatment
Oxygen is used in treatment (e.g., oxygen therapy), but it is not the primary agent of a specific process like bacteria in decomposition. Not a strong match.
B) Yeast: Fermentation
Yeast is the key agent responsible for fermentation, just like bacteria are responsible for decomposition. This is a perfect match.
C) Volcano: Eruption
A volcano undergoes an eruption, but a volcano is not an active agent causing a process like bacteria in decomposition. Not the best match.
D) Antibiotic: Injection
Antibiotics can be given through injection, but they are not inherently responsible for the process of injection. Not a strong match.
Final Answer:
B) Yeast: Fermentation