In geography, a pattern can be classified as

A Geographical Pattern refers to the "pattern" of whatever geographical events you're currently focusing on, however I will list some examples below.

Explanation:

Patterns: The geometric or regular arrangement of something in a sturdy area.

"When we're talking about the location of where the volcanic eruptions occur on a map, you'll be able to find a "pattern", which is; - The volcanic eruptions are most likely to occur around the edge of the pacific, Which is also equivalent to the "ring of fire"" (Polytech)

Linear pattern: Straight pattern, ex. houses along a street

Centralized pattern: Clustered or concentrated at a certain place

Random pattern: A pattern with no specific order or logic behind its arrangement

letter a is the answer

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.