Q: What causes cumulus clouds to grow upward?


Read this paragraph and choose the correct option from the provided answers:

Cumulus clouds are white and puffy. Convection currents make them grow upward and they may grow very tall. When they produce rain, they are called cumulonimbus.

 Choices:

- moisture currents

- gas currents

- mantle currents

- convection currents


A:
convection currents