Pollution :) Since Abiotic means non living.
Bacteria: Living
Food (worms or smaller fish): Living
Predators: Living
Pollution (dirt, trash, or other stuff): Non Living
Alabany according to g0ggle ;))
Answer:
The length of the two wires
Explanation:
A control variable is what you keep the same through the whole experiment so therefore it could be both length and diameter
A. Phenotype.
Genotype is the genetic constitution of an individual organism, genetic makeup is part of the DNA sequence, and personality is the way a person acts.