I believe the answer is: A fly eats a piece of fruit;
From all organism on earth, those who obtain their food through photosynthesis are the one that contain the largest amount of energy, and the energy transferred would keep getting smaller as the organism being consumed by other organism. From the sample above, only trees where the fruit is hanging are the one that obtain their food through photosynthesis
Luring customers by advertising a low price on an item that the store does not intend to sell, then convincing them to buy a more expensive item is referred to as bait and switch. The correct option among all the options given in the question is option "b". It is a totally unethical approach towards business. Here the customer is being fooled to buy a costlier product.