Learning Assignments ETX 10 Practice Test 2026 - Free Practice Questions and Study Guide

Lowered estrogen levels due to exposure to dioxins can lead to delayed breast development in teens. Estrogen is a crucial hormone for the development of secondary sexual characteristics during puberty, including breast development in females. When there is a reduction in estrogen due to environmental factors like dioxins, which are known endocrine disruptors, it can interfere with the normal hormonal balance and development processes in adolescents.

This delay can manifest as a longer duration for the body to reach typical developmental milestones associated with puberty. The other options do not align with the physiological effects of lowered estrogen levels; for instance, improved breast development or increased fertility would not be expected outcomes in the context of decreased estrogen due to dioxin exposure.