Select the most appropriate option to fill in the blank.

As I review the events of my past life, I realise how________ are the influences that shape our destinies.

subtle

The most appropriate option to fill in the blank is:

☀ subtle

Explanation for all options:

1. Subtle: This word means not immediately obvious, delicate, or nuanced. In the context of the sentence, it conveys the idea that the influences shaping destinies are not always easily noticeable.

2. Crude: This word means lacking refinement or being in an unprocessed or raw state. It doesn't fit the context of influences shaping destinies.

3. Plain: This word means simple or without embellishments. It doesn't capture the sense of nuanced influences being discussed in the sentence.

4. Artless: This word means without guile or deception, but it doesn't fit the context of describing influences that shape destinies.