It is a true statement that Southeast Asia is located on the equator, which means almost the entire region falls within the humid tropics. The correct option the two options that are given in the question is the first option or option "a". Equator is actually an imaginary line on the surface of the earth that is at equidistant from the north pole and the south pole.
I would take the advancement of the refrigeration as a crucial part in the increasing of the production.
The refrigeration has been extremely important in the agriculture and the amount of production in it, because with it the agricultural products can be kept fresh for much longer periods. Because the products can be kept fresh for much longer time, that means that they can be delivered to pretty much every part of the world and not be spoiled. So the refrigeration opened up the doors for the farmers in the sense that instead producing only for the region or the country they live in, they can now produce much more for exporting, as the products will not spoil and remain fresh. That has also brought in much bigger profit for the farmers, and the production is constantly increasing because the whole market in the world is open with this technological advancement.
I think it’s B,C,A sorry if it’s wrong
A rift zone sometimes occurs in some volcanoes, more so in the shield volcanoes. It is made up of a linear series of fissures in the volcanic edifice. Lava can erupt from this, let us call it volcanic flank, instead of it's summit. Rift zones tend to extend for dozens of kilometers. Volcanoes have an elongated shape because of the repeated eruptions from these rift zones.