First, the pants would die, they need photosynthesis to grow and gain energy. Then the primary consumers who eat the grass like mice or rabbits would die with the absence of their meals. Then the secondary consumers like raccoons, predatory birds, and other animals that eat them will die without those animals as their food. Then the tertiary consumer, meaning the animal that is not prey in the food chain like the wolf, will have no more raccoons, deer, or other animals to eat because they starved and died. Now the wolf will starve and die. Also if the sun stopped producing energy that means the fire went out and the earth would freeze. So good luck with that ;)
If the water molecule was linear instead of bent, water
would no longer produce hydrogen bonds. It will lose its polar properties and
nearly all of its properties will change such as boiling point, water tension
and solubility. It would be closer to gas, rather than liquid.