Difference between Data Model and Database Schema in DBMS?

Question

I know the Data Model is basically two types ER-Model and Relational Model & Database schema is also two type Physical and logical.

But I can not understand what

Answer 1

As I understand it, a database schema is a physical entity, it describes the structure of exactly how the data is stored and is itself stored by DBMS for reference. Data model, on the other hand, is an abstract representation of database.