Positive feedback is most like
a) an air conditioner which turns on if the temperature gets too hot
b) adding wood to a burning fire to increase the heat
c) not eating anymore when you're full

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.