Final answer:
Developmentalists who emphasize change argue that development is a lifelong process with continuous or discontinuous growth and development in various domains, and they investigate the influence of nature and nurture.
Step-by-step explanation:
Developmentalists who emphasize change argue that development is a lifelong process that involves continuous or discontinuous growth and development in three domains: physical, cognitive, and psychosocial. They also question whether development follows one common course or many unique courses, and they explore the relative influence of nature and nurture on development.