Answer: because you think a letter was easiest way to represent the elements. Another way is to use the chemical symbols and it is to allow you to write chemical formulas easily.
Explanation:
A. the population of higher trophic levels is greater than lower trophic levels
The answer is nucleus acids
Answer: 1 phylum ,genus ,class ,species
Answer:
The Answer is Australopithecus afarensis
Explanation:
