Nouns ending in "o" preceded by a vowel form their plurals by adding "s" or "es"? (it can only be one or the other.)

for example: in, he, a,from

in the sonnet 116 written by william shakespeare we can analyze the symbolism and say that he reuses the idea of love like a guiding star for the sailor.

reading through the poem we find out that in the line 7 there is a metaphor for the lover that is heading through the life events by love itself .