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

☀ People speak various dialects all around this country.

 So, the correct active form is: "Various dialects are spoken all around this country."

The other options and their explanations:

☀ This country speak various dialects.

• This option is not grammatically correct. The subject "this country" should use the verb "speaks" (third person singular) instead of "speak" (present simple plural) to match the original sentence.

☀ This country speaks various dialects.

• This option is grammatically correct, but it changes the sentence structure and meaning slightly. It states that "this country" is the one speaking the dialects, rather than various people speaking dialects all around the country, which is the intended meaning in the original sentence.

☀ People spoke various dialects all around this country.

• This option is in the past tense, not the present tense as used in the original sentence. The original sentence conveys a general truth or a present situation, so the correct option should use the present tense "speak" instead of "spoke."