During a thunderstorm, an observer can see lightning before hearing its thunder. Why do we see lightning before we hear thunder? O Sound travels slower than light
O Sound needs a medium to travel through.
O Sound cannot reflect off surfaces as easily as light.
O Sound is not processed by the brain as fast as light.

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.

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation: