The answer is A, 4.6 billion years old. The solar system was obviously formed after the big bang, and using the big bang theory and the birth of our sun, projections show that our solar system is at most 4.6 billion years old.
I think the answer is obviously letter D
Subarctic climate is found at 60 degree north latitude.
This is because a latitude of 60°N corresponds to a subarctic climate according to the Koppen Classification and the vegetation consists mostly of conifers.
This region is described by cool summers, low precipitation and moderate humidity or long cold winters and short, warm to cool summers.
To know more about subarctic climate, click on the link below:
brainly.com/question/9223202
#SPJ4
