Which of the following phrases is an example of a joint possession?

The phrase "Janet and Tom's house" is an example of joint possession because it indicates that both Janet and Tom share ownership of a single house. This construction implies a collective relationship to the noun, suggesting that the house belongs to both individuals together rather than separately.

When analyzing other phrases:

• "Janet's and Tom's houses" indicates that each person owns their own house separately; there is no shared possession.

• "Janet's and Tom house" is grammatically incorrect as it improperly combines singular and possessive forms.

• "Tom and Janet's houses" suggests that Tom owns one house and Janet owns another, similar to the first example, indicating separate ownership rather than a shared property.

Thus, the choice that accurately reflects joint possession is the one where a singular noun follows both names, illustrating joint ownership in a clear manner.