Answer:
a) how they are organized
Explanation:
<em>a) how they are organized
</em>
<em>b) how they reproduce
</em>
<em>c) how they remain temperature
</em>
<em>d) how they produce macromolecules</em>
Organization of the body of living organisms depends on the number of cells they are made of.
Living organisms that are made up of single cell are simple and are generally referred to as unicellular. Example include Euglena, Clamydomonas etc.
Living organisms that are made up of more than one cells are referred to as multicellular. Multicellular organisms complexity varies depending on the number of cells with the most complex living organism (human) containing trillions of cells.
The correct option here is a.