The mighty Himalayas are like a wall...............

Simile

The figure of speech used in the expression "The mighty Himalayas are like a wall" is simile.

A simile is a figure of speech in which two things are compared using the words "like" or "as." In this case, the Himalayas are being compared to a wall. This creates a sense of the Himalayas as being a massive and impenetrable barrier.

The other answer choices are incorrect. Metaphor is a figure of speech in which one thing is compared to another thing without using the words "like" or "as." Paradox is a statement that appears to contradict itself but may actually be true. Personification is a figure of speech in which inanimate objects are given human qualities. None of these devices are used in the expression "The mighty Himalayas are like a wall.".

The simile "The mighty Himalayas are like a wall" is a simple but effective way to create a sense of the Himalayas' vastness and power. It is often used to describe the feeling of awe and wonder that we experience when we see the Himalayas.