What process describes the transfer of heat through matter by molecular activity?
conduction
convection
radiation
evaporation

Option (a) is the correct answer.

Explanation:

Conduction is defined as the process in which there is transfer of heat through the material of substance due to the difference in temperature of adjoining regions.

For example, cooking omelet in a pan is a conduction process.  

Thus, we can conclude that out of the given options conduction is the process which describes the transfer of heat through matter by molecular activity.

the answer is d. chordata

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.