<span>Like watercolor, the substance that can be applied in a translucent wash, that is well suited to large areas of flat, saturated color is called a gouache. It makes the colors opaque like an inert pigment which is colorless in paints. </span>
The term is called THEORY.
In scientific investigation, a theory is a well substantiated explanation of how a particular phenomenon works based on the set of facts which had been repeatedly confirmed through observations and experiments. A scientific theory gives reliable account of a phenomenon.
I think A sorry of I’m wrong but I researched the other options.
C. The problem of endangered species
Answer: A) Abrasion
Explanation: Abrasion is the process of wearing away a surface by friction.
