What is Rx ? I want explanation

DescriptionA prescription, often abbreviated ℞ or Rx, is a health care program implemented by a physician or other qualified health care practitioner in the form of instructions that govern the plan of care for an individual patient.

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.