The gravity of a black hole is so strong that not even light can escape. Even if a bright star is shining right next to a black hole, you cannot see the black hole. Instead of reflecting the light as other objects do, the black hole just swallows the starlight forever.
The correct answer among the choices listed above is the first option. The number of growth rings is an indicator of the age of a woody plant. A growth ring a concentric layer of wood which is developed on a regular period of growth of a plant.
Answer:
K deficiency cause stomata closing
