Final answer:
Teratogenicity (birth defects) is classified as a division 2 toxic material.
Step-by-step explanation:
A teratogen is any environmental agent-biological, chemical, or physical-that causes damage to the developing embryo or fetus. Teratogens can permanently deform the function or structure of the embryo or fetus, leading to birth defects. Examples of teratogens include alcohol, drugs, certain chemicals like methyl iodide and bisphenol A, and nutrient deficiencies.
In the context of the question, teratogenicity (birth defects) is classified as a division 2 toxic material. This means that it is toxic and can cause harmful effects, but it's not as highly toxic as division 1 materials (very toxic). Therefore, the correct answer is C) toxic.