The process of creating Thangka paintings involves:

The correct answer is: a) Sketching, color application, and outlining.

Thangka paintings are a type of Tibetan Buddhist painting that are traditionally used as religious objects. They are typically made on cotton or silk cloth and are painted with mineral pigments. The process of creating a thangka painting involves several steps:

1. The artist first sketches the composition of the painting on the cloth.
2. The artist then applies colors to the painting, using a variety of brushstroke techniques.
3. The artist finally outlines the figures and objects in the painting with a fine brush.

Thangka paintings are often very detailed and colorful, and they can take many months or even years to complete. They are considered to be works of art as well as religious objects, and they are often displayed in temples and homes.

Here is a brief explanation of each option:

a) Sketching, color application, and outlining: This is the correct answer. It is the traditional process of creating thangka paintings.
b) Freehand drawing and shading: This is not the correct answer. Thangka paintings are not typically created using freehand drawing and shading.
c) Spray painting and stenciling: This is not the correct answer. Thangka paintings are not typically created using spray painting and stenciling.
d) Printing and digital manipulation: This is not the correct answer. Thangka paintings are not typically created using printing and digital manipulation.