Which of the following is not a stage in the development of a thunderstorm? a) developing stage b) dissipating stage c) mature stage d) updraft stage

The correct answer is option D, that is, the updraft stage.

Explanation:

All the thunderstorms, regardless of their type, undergo three phases. These are the developing phase, the mature phase, and the dissipation phase. The initial phase of a thunderstorm is the developing stage or the cumulus stage.  

The second phase is the mature stage, in this, the warmed air rises spontaneously until it attains a region of warmer air and can elevate no more. The final phase is the dissipation stage, in this the thunderstorm is subjugated by the downdraft.  

the dark variety, as they are not visible on the dark tree barks

explanation:

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds