Which of the following are not properties of carbon?

.it's very cohesive and adhesive.
.it can form polymers like carbohydrates, lipids, proteins, and nucleic acids.
.it can regulate temperature.
.decomposition of molecules can occur readily, releasing needed energy.

Option C, It can regulate temperature

Explanation:

Carbon atom is able to form bonds with other carbon atoms or atoms of hydrogen , oxygen , nitrogen , phosphorus etc. A carbon forms a diamond/graphite when it joins cohesively while they form molecules like hydrocarbons, CO2 etc, when it joins adhesively with other than carbon atoms. Thus Option A is incorrect

Since carbon combines with other chemical atoms to form polymers, lipids  , proteins etc, as they are adhesive to other than carbon atoms. Option B is also incorrect.

Option C, is a physical phenomena in which carbon compounds  do not allow heat to escape from earth and in this way it regulate the temperature of earth. This is not an internal property of carbon and hence option C is correct.

Option D is incorrect as carbon can be easily decomposed along with production of energy by decomposers or by burning the fuels containing carbon.

the answer is a) a shiprock was formed by igneous process