Please answer the question below in 4 sentences. Use tranisition words to make it easier to understand how your thoughts and ideas are connected. You must write write 4 sentences or points will be counted off.

Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87