if the price a product increase from R200 to R250 then demand falls from 450 to 300 units. Calculate PED and determine the Degree of elasticity​

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.