Questions

The first indicator of an approaching thunderstorm is a buildup of dark clouds.

A thunderstorm is a storm with lightning and thunder; it is usually produced by heavy rain, gusty wind, and the cumulonimbus cloud. The thunderstorm is made up of moisture, unstable air and lift.

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel. By default, a Linux user falls under same as userid (UPG) group.

Kalsubai and Salher are two omportant peakes in the northern section of Sahyadris.Pusphagiri is an elevation in the Southern  Sahyadris.

Qualm means feeling confused, uneasiness, very doubtful and being in worry.

Hence, among the given options, Qualm is the opposite of Confidence.

There are many possibilities for this.

We can hold a breathe, meeting, conversation, party, grudge, etc... but cannot touch them.