1,Identify statements expressing conditions by highlighting them. 2, classify each conditional as to zero, first, second or third conditional and
3,explain in 4-5 sentences the meaning that the song portrays.

The question is incomplete because there is no song available over the question to write about or portray.

The explanation for the conditional is given in the explanation part.  

Explanation:

Conditionals are phrases or sentences that help to speculate the happenings at any moment of time.

The sentences that contain conditional tense, contain the terms like if.

Basically, there are four ways to sturcture any conditional sentence. all the sentences contain the if statement, or a clause, or the main statement.

Here are some types of conditional clauses or phrases added to the conditional sentences.  

For more information on this answer, get to the link provided below:

link

This question is incomplete and I could not find online the song to which your question refers, but anyway I will give you an explanation about the conditionals that will help you to understand this.

Explanation:

Conditionals are used to speculate about what might happen, what might have happened, and what we would like to see happen.

Most sentences that use the conditional tense contain the term "if".

There are four main ways to construct conditional sentences. In all cases, they consist of an "if" statement or clause and a main statement.

Next I will write the types of conditionals that exist, their use and the structure they carry:

if + simple present, simple present

If + Simple present, simple future

If + Simple past, Present conditional or Present continuous conditional

If + past perfect, Perfect conditional

- the heat nearly killed them that first summer.