Which statement is a theme?
two friends travel in search of the dreaded monster.
the cedar forest is a marvel of towering trees.
encouragement can be a source of strength.
humbaba is an evil monster who is defeated.

Encouragement can be a source of strength.

Explanation:

A theme is a subject or topic of discourse, it acts as the base of the literary piece.

The other options are not themes they are descriptions because they tell how something is.

  I hope this answer helps you.

the use of “as” in the example to draw the resemblance. some more examples of common similes are given below. common examples of simile. our soldiers are as brave as lions. her cheeks are red like a rose. he is as funny as a monkey. the water well was as dry as a bone. he is as cunning as a fox. simile introduces vividness into what we say.

you didn't show the passage, so unfortunately i cant you.