Which characteristic describes an organism of kingdom plantae? a) movement occurs when its food supply runs low. b) sunlight is used to make its own food. c) water is not needed for survival. d) oxygen is needed for breathing.

The correct answer is B) Sunlight is used to make its own food.  

Plants, which are classified as autotrophs because they make their own food, use the process of photosynthesis to create glucose and other similar molecules using sunlight, water, and carbon dioxide.  

Answer A is not correct because plants cannot move, despite their food supply.
Answer C is incorrect because water is necessary for the survival of plants and other living organisms.
Answer D is incorrect because plants do not breathe.  In addition, plants actually give off oxygen through the process of photosynthesis, while humans take it in to breathe.

I hope this helps!

The answer is one amu.