Of all the ancient calendar systems, the Maya and other Mesoamerican systems are the most complex and intricate. They used 20-day months, and had two calendar years: the 260-day Sacred Round, or tzolkin, and the 365-day Vague Year, or haab. These two calendars coincided every 52 years.
Its because oil paints are known for their flexibility and depth of colour.
Answer: Ethical
Explanation:
Ethical manner involved while researching is the process for carrying out researching with certain standards and guidelines that is required to be followed in research field and profession. Following ethics while conducting research requires maintain values, practicing just practices, well-being of participant , dignity maintenance etc.
According to the question, researcher is performing his/her study based on ethics as he/she is following guidelines for maintaining welfare of research professional field while conducting research.
