How does a 25 Watt light bulb react to heat from a fire?

A 25 Watt light bulb can exhibit changes when exposed to heat sources like fire. The right answer reflects the physical properties of glass when subjected to high temperatures.

When a heat source, such as a fire, is present, the glass in the light bulb can heat up. As glass heats, it can expand; however, if the temperature changes rapidly or if the heat isn't evenly distributed, the material's structural integrity can be compromised. In some cases, the glass may pull inward or deform due to differences in thermal expansion, especially if heated unevenly.

Selecting the option about pulling inward captures the situation accurately because it accounts for the physical reaction of the glass to the heat. A rapid temperature change or localized heating may lead to internal stresses that could cause it to deform inward, rather than simply expanding outward or shattering instantly.

This also helps explain why other responses do not fit as well as the chosen answer. For example, while glass can shatter due to extreme heat, the option that suggests it shatters instantly does not consider the gradual effects of heat exposure, which can cause deformation before shattering.