All of the following are examples of physical properties except
a melting point
b. hardness.
c. ability to burn
d. density

C. the ability to burn

Explanation:

Physical properties tend to include color, smell, freezing point, boiling point, melting point, infra-red spectrum, attraction or repulsion , magnets, opacity, viscosity and density. And hardness is obviously physical

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.