Answer:
d. lead
Explanation:
Sulfur, Hydrogen and Oxygen are found in amino acids.
Scientists used the scientific method too learn more about how dinosaurs became extinct because with out that method it would be difficult and it would take a longer process too find out if they where really extinct
A biomass pyramid shows the mass that each trophic level are producing overall. e.g., 10 000 kilograms of grass - 1000 cows - 100 kilograms of meat.
A pyramid of numbers shows how many animals in numbers are on each trophic level. E.g., 100 kookaburras - 20 snakes - 100 insects. A pyramid of numbers is not necessarily triangular in shape all the time.