Answer:
The number of links in a chain
Step-by-step explanation:
An independent variable is any variable whose value or identity does not in any way affect the event of another variable in the system. A dependent variable is a variable whose value or identity depends on one or more variables in the system.
From the information given:
The length of the chain is an independent variable while the number of links that depends on the length of the chain is the dependent variable.
