A child genetically predisposed to a difficult temperament illustrates the influence of:

1. Development reflects what a child brings as well as what happens to them. 2. An example given is a child who may be genetically predisposed to a difficult temperament. 3. That predisposition then interacts with the environment the child grows up in. 4. Neither heredity nor environment acts alone. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 9 'Lifespan Development', sections 9.1-9.4_