Select the most appropriate meaning of the given Idiom:-

In the heat of the moment 

Saying without thinking in anger

The most appropriate meaning of the idiom "in the heat of the moment" is saying without thinking in anger. The idiom comes from the idea that when people are angry, they are more likely to say things that they do not mean. In a figurative sense, to say something "in the heat of the moment" means to say something without thinking, often because you are angry or upset.

The other options are not as accurate descriptions of the meaning of the idiom. Being very happy is not typically associated with the idiom "in the heat of the moment." A very hot day is not typically associated with the idiom "in the heat of the moment." Deteriorate rapidly is not typically associated with the idiom "in the heat of the moment."