1. Which is true?
a. Food chain is interconnected producer-consumer relationship.
b. Food web is also considered as consumer-resource system.
c. Ecological pyramid shows how organisms interact with each other.
d. Autotrophs acquire least amount of energy.
An autotroph or primary producer is an organism that produces complex organic compounds using carbon from simple substances such a carbon dioxide,generally using energy from light or inorganic chemical reactions.
