A worker who process rice is engaged in?

A worker who processes rice is engaged in "manufacturing activity". This is because processing rice involves the transformation of the raw material (rice grains) into a finished product (processed rice) through various manufacturing processes such as cleaning, polishing, milling, and packaging. The goal of manufacturing is to create tangible goods from raw materials or components, adding value to the original materials. Therefore, processing rice can be classified as a manufacturing activity.