The environment includes abiotic (nonliving) and biotic (living) factors. An ecosystem consists of all the biotic and abiotic factors in an area and their interactions
When molecules uses energy for transportation across the cell, then it is known as "Active Transport"
So, option B is your answer.
Hope this helps!
Water is polar. Lipids are non-polar.
Lymphocytes are the cells responsible for waging war againsy disease or infection.
