Which gesture is used to express approval in Western cultures?

Here is the question :

WHICH GESTURE IS USED TO EXPRESS APPROVAL IN WESTERN CULTURES?

Here is the option for the question :

• Peace sign
• Clicking heels
• Thumbs up
• Bowing

The Answer:

And, the answer for the the question is :

Explanation:

[STC0016949]. The sign for “thumbs up” is understood to convey a positive and congenial affirmation in many Western countries, including North America. The now-familiar hand signal, which consists of the thumb pointing upward and the fingers being tucked into the palm of the hand, was first described in the book “Over the Top,” which was published in 1917. It is thought that pilots used it as a means of communication during propeller testing in the early stages of pre-flight inspections, and that this is where the term acquired its connotation.