Biological factors is influenced by a child's genetic inheritance or changes in a child's genetics ad chromosomes.
In most cases genetic factors are immediately identifiable, such as: heart conditions, cleft palate or Down syndrome.
Physical traits - face shape, hair colour, eye colour, skin colour
Physical Health - Asthma, diabetes
SEND - Autism, Foetal Alcohol syndrome
Disabilities - Vision impairments, cerebral palsy, spina bifida