You should be worried about they safety of a healthcare product if u see which of the following claims made? A)FDA approved
B)miracle cure!
C) scientifically tested!
D) Effective in double- blind study

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added