Question

when is it \safe\ for a cacti to open the stomata?? during the day during the night rewatch

Explanation:

Cacti are succulents adapted to arid environments. Opening stomata during the day would lead to high water loss via transpiration due to heat and sunlight. At night, temperatures are lower, humidity is relatively higher, so water loss is minimized. Thus, cacti open stomata at night to take in carbon dioxide (for photosynthesis, which they later process during the day with stored CO₂) while reducing water loss.

Answer:

during the night (the checkbox next to "during the night" should be selected)