Answer:
In this particular food chain, the original source of food was the flowers.
Step-by-step explanation:
A food chain can be described as a linear network representing the production and absorption of energy by different organisms. It starts with producer organism, such as the flowers mentioned in the question, which use sunlight to make their own food, so to speak. If the flowers are eaten by another organism, then their energy is transferred to that organism, as is the case with the cricket mentioned. Since the food chain we are analyzing here mentions the flowers, cricket, and praying mantis, and since they are consumed in this sequence, we can safely say that the flowers were the original source of food.