Why it is advisable to use pressure cooker at high altitude for cooking food?

Because when you are at a high altitude there is a major pressure increase and there is less air the higher elevated you go. A pressure cooker will help properly cook foods at high altitudes.

That is right it is more than a vantage at a higher altitude to cook do to the increase in pressure at the higher altitude, which increases the ability of the pressure with low pressure air at that altitude.

So what you would do is go through and add 3 teaspoons(tsp) 6 times because of the 6 tablespoons(tbsp). which will give you an answer of 18. another way is to multiply 3x6=18.

The answer is d- principle of faunal succession.