if you are talking about the take home test, the answer is UV .
All life on Earth.
All life on Earth depends on the sun's light. Without it we would die.
probably the sun......?
The sun's light energy I think...
In that case, we die - all life on Earth dies. Life on Earth is completely dependent on the energy from the Sun.
Plants generate their own food from sun light and earth , but all others depend on plants
IT will no longer porvide light, which would make life impossible on earth
In the ordinary course of things, periodontitis is not life-threatening but needs to be attended to, because it affects your general health. It is, after all, an infection and can lead to other complications. See your periodontist.
Without the Sun's light and heat, the surface of the Earth would freeze solid quite quickly, killing all life on the surface.
ALL wild animals face life-threatening struggles, mainly of two types: 1) finding enough to eat; 2) avoiding things trying to eat them.
All life on earth is adapted to a day/night cycle. Further, all life on earth is ultimately dependent on plant life, and plant life is dependent on sunlight. Were no sunlight to reach earth due to thick ash clouds or something else obscuring sunlight, plants would die, herbivores would die and finally carnivores would die. There would be no food for humans to survive on, except for fungi which are not dependent on light.
The Sun is the star around which Earth and the other bodies in the Solar System orbit. It is an important source of light and heat for life on Earth.