15. What challenges do commercial farmers face concerning International trade?
a. LDCs need to grow crops people in MDCs want (coffee, tea, cocoa)
b, food supplies increase despite constant demand
c. managing land properly
d. Increasing trade

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.

Convection current is the main process through which heat is transferred in bulk from one location to another through the cyclic motion of a large volume of substance.

Icannot see the table or the question