[Humble]

Hi,
Here's from Michael Swan:
generalisations with singular words

Sometimes we talk about things in general by using the with a singular countable noun.

Schools should pay less attention to examination success, and more attention to the child.

This is common with the names of scientific instruments and inventions, and musical instruments.

Life would be quieter without the telephone.

The violin is more difficult than the piano.

We can also generalise by talking about one example of a class, using a/an (meaning 'any') with a singular countable noun.

A baby deer can stand as soon as it's born.

A child needs plenty of love.

Note that we cannot use a/an in this way when we are generalising about all of the members of a group together.

The tiger is in danger of becoming extinct.

(not A tiger is in danger of becoming extinct. The sentence is about the whole tiger family, not about individuals.)

Do you like horses? (not Do you like a horse?)

Regards