Question

1/ Selectors combined in a comma-separated list so you can apply the same properties to them all.

Grouped property

Grouped style

Grouped value

Grouped selector

2/ The concept that some selectors have more “weight” and therefore override rules with less specific selectors.

Specificity

Cascade

Rule order

Box model

3/ Selects all the elements in a document of a given element type.

Style selector

Property selector

Element type selector

Grouped selector

4/ Provides a list of elements to be selected, separated by commas.

Grouped selector

Element type selector

Property selector

Style selector

Answer 1

1) Grouped selector.

CSS allows to group multiple selectors that share the same declarations separated by commas, that is ,it allows us to apply same style to multiple elements to save space. This is called grouped selectors.

2) Specificity

It is a score or rank that determines which style declarations are applied to an element. If multiple CSS selectors are targeting the same HTML element, ie,  if the CSS selectors are trying to assign the properties to the same HTML element, the selector with the highest specificity value will win and take effect.

3) Element type selector

The CSS type selector matches the element by node name or it selects all elements of the given type within a document. It targets element types on the page and they are also called element selectors because it use the element's HTML tag as the selector.

4) Grouped selector

When element selectors share the same declarations, they may be grouped into comma separated list which is called grouped selectors. Grouped selectors provide a list of elements to be selected, separated by commas.

I hope this is what you are looking for. Please rate this answer to let me know it was helpful to you. Thanks for reading..