Plants produce carbohydrates for themselves through the process of photosynthesis. The carbon cycle is carried out when carbohydrates produced by plants are passed on along the food chain to animals and other consumers.
When I woke up today, I took a shower and I brushed me teeth, then everything changed when the fire nation attacked... I'm just kidding, I'm just reaching the 20 character limit. The answer to your question is carbon cycle.
