height or heights

[phoebemia]

in A Day in London, Oxford Reading Tree, there's a paragraph as below:
They went to Trafalgar Square. On top of the column was a statue of Nelson. "I wouldn't like to be up there", said Biff. "I don't like heights."
What does heights mean here? Why is it in plural form? Can it be height? And what does this sentence mean? Does it mean Biff doesn't like to be in a place that is very high?
Thank you for your help!

 

[tedmc]

I don't like heights.

It means "I don't like to be in places far/high above the ground". It comes in plural form, to refer to places rather than a place.
The fear of heights is also called acrophobia.

 

[Tdol]

The person is afraid of heights in general, not just Nelson's Column.

 

[emsr2d2]

In "A Day in London", Oxford Reading Tree, there's a paragraph as below I read/found the following:

They went to Trafalgar Square. On top of the column was a statue of Nelson. "I wouldn't like to be up there", said Biff. "I don't like heights."

1. What does "heights" mean here?
2. Why is it in the/its plural form?
3. Can it be changed to "height"?
4. And What does this the sentence mean? Does it mean Biff doesn't like to be in a place that is very high?

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