April found a rock on his vacation to Hawaii. Upon studying it, he noticed that it was very smooth and the mineral crystals were hardly visible, so it appeared to be only one color. What kind of rock did he find?

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.