Is this a simple sentence or a compound sentence? Explain

Solution
As all the clauses are independent and are not joined with any conjunction, this is a simple sentence.
Note:
There are mainly three kinds of sentences in English: simple, complex, and compound.

A simple sentence consists of just one clause. ​​In its simplest form, a simple sentence consists of a subject and a verb.
A compound sentence is made up of two or more independent clauses.