Biological predisposition is when a subject (human, animal, plant) possesses some internal quality that gives them an increased likelihood of having a condition. This is a technical definition, and what it's saying is this living thing has a higher probability to have condition X, Y, or Z. The title of the section alludes to a quality in something's past that will influence its future
Genes are molecular units for trait heritability. They're often made up of groups of DNA. DNA makes proteins, proteins make cells, cells make tissues, tissues make organs, and organs make up you. Many people like to point out that humans share 98% of their genes with chimpanzees. While this is mostly true, it should also be noted that humans share about 60% of the same DNA with banana plants. This means that a great deal of what genes do is fundamental, such as how to build cell walls and convert sugar to energy
Hence, the right answer is "biological predispositions"
