Internalizing external costs -increases the chance for environmental degradation.
-involves making the market price approach the true cost of an economic goo
-omits the costs of taxes.
-fails to include the cost of pollution.
-is a simple change to make.

increases the chance for environmental degradationfails to include the cost of pollution

Explanation:

The external cost is known as externalities and refers to uncompensated social or environmental effects. An example of it is the fuel station when you purchase the fuel for the car you pay for the product that is internal cost and not for the air pollution it creates.

Answerleveling;

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.