Read the following email message. Complete the email by filling in the blanks. Select the best choice for each blank.

Hi Alex, I'm excited about our upcoming Arctic expedition next month! I've been reviewing the equipment guide from Northern Survival Experts, and I wanted to share some important points with you. First, for clothing, we need to focus on the layering system. The guide emphasizes that we should absolutely 1 .... as it becomes dangerous when wet. Instead, we should opt for merino wool or synthetic materials for our base layer. For the mid layer, the guide suggests that 2 .... rather than relying on one thick garment. This helps with insulation and temperature regulation. For our extremities, I was surprised to learn that 3 .... provide more warmth than regular gloves. We should also invest in proper footwear - the boots need to be rated for extremely low temperatures, at least 4 .... according to the guide. Regarding emergency equipment, I'm thinking we should rent the 4-season tent and sleeping bags rather than buying them, since they fall into the 5 .... price category. The sleeping bags need to be rated for -30°C or lower, which makes sense given where we're going. Let me know if you want to sign up for one of their training courses together. The 3-day Advanced Cold Weather Skills course looks particularly useful for our trip. Cheers, Jordan

Choose the best option.

Jordan and Alex are 1 ..... According to the email, Jordan suggests that they should 2 ..... The guide indicates that in arctic conditions, people need to consume approximately 3 .... per day.