Ecologist study the varieties and interactions of
a- living things across time
b-living things across space
c-macromolecules in living systems
d- macromolecules in non-living systems

Ecologist study the variety and interactions of organisms

Human economics and ecology are linked together because human economics utilizes the ecosystem and the natural resources in order for economics to actually exist. As living organisms in the biotic environment, human beings need food, water and resources in order to survive and thus, it is used in trading, buying and selling of the goods, where economics function. It also applies the supply and demand approach and uses strategy in how to maintain and innovate resources.  

I'm sorry to hear that. i will try to answer your other questions if it is within my ability. : )answers: my favourite colour is black.my favourite food is pasta.my favourite school subject is english, but i do also like lunch time.my least favourite subject is history as well as geography. i have currently garnered a quite equal hatred for both of the subjects.what about you? well, you for the points. : )

Could you be more specific w the question lol