Which of the following ideas did charles lyell subscribe to?

a: human populations grow faster than their resources.
b: earth must be far older than most people believed.
c: he developed the idea of inheritance of acquired characteristics.
d: traits an organism develops during its own lifetime can be passed onto its offspring.

He was a close friend to Charles Darwin so he helped him out in creating the theory of evolution so I would say C: He developed the idea of inheritance of acquired characteristics.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.