Answer:
unneeded
Explanation:
The adjective superfluous means unnecessary, typically when it is more than enough. As a conquence, the uncle considers that, since his nephew has a lot of toys, it would be nonessential, excessive and useless to give him another one.
The other answer options are incorrect because wise has to do with having experience, knowledge and good judgment; generous means showing willingness to give something more than it is necessary; and unkind refers to someone inconsiderate and rude to others.
