Which property is the most important for a metal used in cutlery?Low densityGood heat insulatorLow melting pointUnreactive

The most important property for a metal used in cutlery is being unreactive. This is because cutlery is used for eating, and you wouldn't want the metal to react with the food or the drink. If the metal reacts, it could change the taste of the food or even be harmful to our health.

Here's why the other options are less important:

1. Low density: While it's true that we don't want our cutlery to be too heavy, most metals are already dense enough to give cutlery a good weight without being too heavy to use comfortably.

2. Good heat insulator: This is not typically a necessary property for cutlery. Most of the time, cutlery is used to eat food that is already at a safe temperature. In cases where the food is very hot, the part of the cutlery that comes into contact with the food (like the tines of a fork or the bowl of a spoon) is usually small enough that it doesn't conduct enough heat to be uncomfortable or dangerous.

3. Low melting point: This would actually be a bad property for cutlery. We don't want our cutlery to melt under normal use conditions, even if it's being used to eat hot food. Most metals used in cutlery have high melting points well above any temperature that would be encountered in normal use.