List any three environmental factors that should be monitored

Temperature, moisture, air quality

Explanation: Environmental factors are non-living or abiotic factors that affect, dictate or limit the distribution of organisms in an environment. These factors include temperature, moisture, light intensity, salinity, degree of acidity or alkalinity, air quality, etc depending on whether the environment in question is a terrestrial or aquatic environment.

Temperature which is the degree of hotness or coldness of a place limits the distribution of organisms and needs to be monitored because a slight change might cause a major shift in species's equilibrium. While some organisms are able to survive only in low temperature, some can only exist in moderate temperature while some few others can survive in high temperature. An example of what a change in temperature of the environment can cause can be seen in the issue of climate change currently which is a major topic in the scientific world.

Moisture and air quality refer to the amount of water and the quality of air found in an environment respectively. Water serves as major constituent of protoplasm and an essential component of any solution. Every organism's body has an amount of water. Too much or too little of moisture in an environment will cause a discomfort or even death of the organisms living in such environment. The presence of toxic substances in the atmosphere will affect the organisms that breathe-in air from the atmosphere as well.

the answer is c) an oak tree

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".