For 06.02 Heredity, in FLVS, does anybody know what the test variables and outcome variables are? It is for science

Which statements about a food chain are true? choose all answers that are correct. a.plants are the first living organisms in food chains on land. b. the plants in a food chain are called herbivores. c. all food chains on land begin with energy from the sun. d. carnivores in a food chain eat only plants.