The correct Active/Passive form of the given sentence is:

☀ Some old people are oppressed with the fear of death.

Explanation for other options:

☀ Some old people are oppressing with the fear of death. This option uses "are oppressing," which is in the active voice, and it does not represent the correct passive form. The correct form should use the passive construction "are oppressed."

☀ Some old peoples were oppressed with the fearing of death. This option changes the tense to past tense ("were oppressed") and uses "the fearing of death," which is not the correct form. The correct form should use "the fear of death" as in the original sentence.

☀ Many old people have been oppressed with the fear of death. This option changes "some old people" to "many old people" and uses the present perfect tense ("have been oppressed"), which is not the tense used in the original sentence. The correct form should be in the present tense as shown in the correct option.