The line graph below shows the average amount of dissolved nutrients in a body of water each year from 1998 to 2003. Which human activity most
likely affected this body of water between 2000 and 2003? *
The amount of rainfall will increase.
O Rivers may be contaminated by sewage.
Light pollution in the town may decrease
O People will develop more farms in the town.
PLZZ HELP PLZ

 A male who is affected by a defective gene would have a symbol of shaded square that the horse breeder would use in the pedigree that is ■.

Pedigree can be described as a representation of a family and its lineage ( that is its ancestory and line of descent) in a form of flow chart ( using standard symbols), which depicts the pattern of inheritance of a particular disease.

For a male, a symbol of square is used and for a female, a symbol of square is used  ( that are shaded if the individuals are affected with a disease)