Question

1. which question could help you determine if human activities have contributed to the change in the arctic ice caps?

how many times have the ice caps melted in the past??
what factors are contributing to the rise in greenhouse gases?
any of the questions are appropriate to ask in order to find the cause.
how much greenhouse gas is in the atmosphere?

Explanation:

To determine if human activities have contributed to the change in the Arctic ice - caps, understanding factors contributing to the rise in greenhouse gases is key. Human activities such as burning fossil fuels are major contributors to greenhouse gas emissions. Knowing past ice - cap melting events doesn't directly link to human activities. Just knowing the amount of greenhouse gas in the atmosphere doesn't isolate human - caused factors.

Answer:

What factors are contributing to the rise in greenhouse gases?