Which sequence best represents increasing complexity?

The following choices are provided;

(1) tissues → cells → organelles → organs

(2) cells → organelles → organs → organism

(3) organelles → cells → tissues → organs

(4) organism → cells → tissues → organelles

The answer is; (3)

Each organelle performs a particular function in cells. Cells are the basic unit of organisms and are complete self-sustaining life entities.  Many cells, differentiated to perform a particular function, make up a tissue (such as bone, muscle tissues). Many tissues come together to make up an organ such as the heart that is composed of cardiac tissue, nerve tissue, blood tissue, etcetera.  

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c