Commenting. When someone comments of a blog the blog's writer can comment back, to answer questions, etc.
Answer:
While the developed world benefits from the modern explosion of technology, countries like Ethiopia continue to rely on their forefathers' methods for important daily tasks such as farming, cooling, and providing clean water. These activities are often physically challenging, time and energy intensive, and are often carried out by female family members in many such societies. Furthermore, they can damage the local ecology and climate, such as deforestation and soil erosion caused by the use of trees for firewood. Western technologies are often too complicated, expensive, unacceptable, and difficult to maintain in developing societies, so they are of little or no use in these situations.
Answer:
A) ALU
Explanation:
The arithmetic logic unit (ALU) performs the arithmetic and logical functions that are the work of the computer.
So, the correct option is - A) ALU