[Grammar] Reduction/Omission?

[vcolts]

Ex.


A man (who is) capable of lifting three people can certainly lift the bricks.


The man, (who was) angry and bitter, continued to take a jab at the tree.


Q.


What do we call this omission in terms of grammar? And why are they being omitted?

ESL students are usually taught not to use an adjective right after a noun (ex. "A man angry took a jab at the tree" would be wrong.).


Thanks in advance.

 

[5jj]

A man (who is) capable of lifting three people can certainly lift the bricks.
The man, (who was) angry and bitter, continued to take a jab at the tree.

\if tou omit the bracketed words, you have reduced relative caluses

ESL students are usually taught not to use an adjective right after a noun (ex. "A man angry took a jab at the tree" would be wrong.). .

The man, angry, took a jab at the tree is OK, as is:
A man angry with the world may take a jab at a tree.