Fuel made from plants are called biofuel. These fuels can be renewed in anywhere from 2 to 100 years depending on the plants used to create the fuel. Compared to fossil fuels, biofuels

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem

The hawk receives 0.1% energy from the caterpillar although the caterpillar gets eaten by another bird smaller than the hawk first

They use the si unit, or metric system its all the same thing

Ithink the answer is b
not sure