Final answer:
The yellow circle with a large X symbolizes radioactive danger, warning of radiation hazards, which pose risks such as DNA damage and cancer.
Step-by-step explanation:
A yellow circle with a large X in it extending to the sides of the circle often represents the radioactive danger symbol. This symbol is widely recognized as a warning for the presence of radioactive materials and is used to caution the public or workers in various settings. It is an important safety symbol that indicates the need for caution around potential radiation hazards, which can cause DNA damage, Cancer cell growth, and potentially lead to the development of a Tumor.