Which type of variable which can be measured along a continuum?

What variable possess NO quantitative value?

This variable type has a clear definition of zero.

What kind of variable causes, influences, or affects outcomes?

What variable manifest or show the effects of the treatment variables?

These are variables that the researcher failed to control that caused considerable effects to the research outcomes.

What variables are carefully measured, monitored and controlled because they may affect the dependent variable?

A group of students would like to know if spending time with a dog decreases the amount of stress and allows students to perform better on tests. Which of the following is an extraneous variable?

A famous vlogger wanted to know if changing the content of his vlogs will affect the number of views per uploaded video. What type of variable is the number of views per uploaded video?