There is only species of a koala but you can ask how many races there are.
The name is, "phascolarctos cinereus".<span />
"A. Natural resources and human labour".
I agree.
An environmental change is occurring due to continents shifting and moving to different parts of the earth’s surface is a long term change due to tectonic plates movements. if this happends for the continously then there will be different sesonal changes .
<span>repressors as well as by transcriptional activators.</span>
I think it is D but I might be wrong !!! Hope I help !!