Actual texture uses your sense of touch.
Antony Gormley's Asian Field is a vast <u>installation</u> artwork made up of small clay figures.
Installation art refers to large-scale art, where various constructions are used in order to transform certain spaces in imaginative ways. Usually, these constructions are really extensive, which is also the case here with this artwork - you can see it in the photo below.
D. As you should quote the author and their page number in most cases.