Select the correct indirect form of the given sentence.

The lawyer said, "Your case is very complicated."

The lawyer said that my case was very complicated. 

The correct indirect form of the given sentence is:

The lawyer said that my case was very complicated.

This is because the indirect form of a sentence is used to report what someone said without using their exact words. In the indirect form, the subject and tense of the verb may change. In this case, the subject changes from "you" to "my" because the lawyer is speaking to the person whose case is complicated. The tense of the verb changes from "is" to "was" because the lawyer is reporting what they said in the past.

The other options are incorrect because they do not follow the rules for indirect speech:

• The lawyer reported that my case is very complicated. - This sentence uses the present tense instead of the past tense, which is incorrect in indirect speech.
• The lawyer said that my case had been very complicated. - This sentence uses the past perfect tense, which is not necessary in this context.
• The lawyer warned that your case was very complicated. - This sentence uses the verb "warned" instead of "said," which is incorrect in indirect speech.