The updrafts in thunderstorms are initiated by thermal instabilities at the surface. What process tends to increase the vertical instability that feeds the thunderstorm development?

Answer: The release of latent heat by condensation

Explanation: Thunderstorms are formed with three stages;

1.) The cumulus stage when storm clouds form.

2.) The mature stage when the storm is fully formed

3.) The dissipating stage when the storm weakens and breaks apart.

When moist air are warm, they move upward in an updraft, swollen cumulus clouds may form in the atmosphere.