Which of the following items is known to contain lead?

The correct option is associated with storage batteries, which are commonly known to contain lead. In lead-acid batteries, lead is used as one of the key components for both the positive and negative electrodes. This makes them effective as a reliable source of power for vehicles, backup systems, and other applications. The use of lead in this context is highly regulated due to its toxicity and potential environmental impact.

As for the other items mentioned, wooden toys typically do not contain lead unless painted with lead-based paint, which has become less common due to safety regulations. Colored pencils also do not contain lead; instead, they are made with pigments and waxes. Lastly, ceramics without glaze are generally safe and do not contain lead, although some older, unglazed ceramics may pose a risk if lead-containing materials were originally used in their production. Thus, storage batteries stand out as the clear option known to contain lead.