Question

Describe briefly the first wonder in Revelation 21:
a new heaven
a heavenly city
a new earth
all manner of precious stones
no turbulent sea

Answer 1

It explains that the earth will be renewed and become the new heaven. The verse explained that at the right time people will be with Christ.The transition will come to pass and finally change all that  God has created.

I think this is the answer to your question.

Answer 2

correct answer is

• a new heaven
• a new earth
• no turbulent sea

Revelation 21:1  : Then I saw "a new heaven and a new earth," for the first heaven and the first earth had passed away, and there was no longer any sea.