One of Penelope Eckert's findings about California accents is that when people are and want to stay involved in their home community, they:
A. develop a unique accent.
B. tend to adopt a speech pattern with less of an accent.
C. copy the English they hear on the radio.
D. tend to talk like locals.
E. often develop extended versions of nonverbal communication among peer groups.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.