What do we call an agent that can cause harm to an embryo or fetus during prenatal development?

The correct term for an agent that can cause harm to an embryo or fetus during prenatal development is teratogen. Teratogens are substances or factors that can lead to developmental abnormalities, affecting the normal growth and formation of the fetus, resulting in conditions such as physical malformations or functional deficits. Common examples of teratogens include certain medications, alcohol, tobacco, and infections.

In the context of prenatal development, understanding teratogens is crucial for expecting parents and healthcare providers to minimize risks and promote healthy pregnancies. Recognizing what constitutes a teratogen and the potential effects it can have on fetal development is essential in fields such as pediatrics, obstetrics, and developmental psychology.

The other options refer to unrelated concepts. A visual cliff is a tool used in psychology to assess depth perception in infants. Temperament refers to an individual's characteristic mood, activity level, and emotional reactivity, influencing personality development. The theory of mind pertains to the understanding that others have thoughts, beliefs, and desires that may differ from one's own, typically developing in early childhood. None of these concepts relate to prenatal agents or their harmful effects on fetal development.