What is the definition of matrix?

a.

surrounding; encircling

c.

the basic unit of the composition of an image on a television screen, computer monitor, or similar display

b.

a liquid exhibiting properties of a crystal that are not shown by ordinary liquids

d.

a situation or surrounding substance within which something else originates, develops, or is contained

I think it’s d. a situation or surrounding

D. a situation or surrounding substance within which something else originates,develops, or is contained

Personification.

Explanation:

Personification is conferring human qualities on non-humans especially non-living things.

Personification is used in the poem Fog.

"The fog sits looking over the harbor and city.

Here, "sits" and "looking over" are human qualities which Carl used to describe the fog.