Final answer:
The two colors that don't use birth catalysts are Obsidian and Pink.The correct answer is Option C
Step-by-step explanation:
The correct answer is Option C: Obsidian and Pink. The other options either include colors that do not exist or colors that require birth catalysts to be produced.
Obsidian is a naturally occurring volcanic glass and its color is purely a result of its composition. It does not require any catalysts, such as a chemical reaction, to form. Similarly, pink is a color that can be produced by mixing red and white pigments, without the need for any catalysts.
On the other hand, gold does not naturally occur in its pure form and requires various catalysts, such as mercury or cyanide, to be extracted from ores. So, option D is incorrect as gold does use catalysts in its extraction and purification process.