Which of the following would be considered a source of error in an experiment?

a. laboratory mice are similar but not identical to each other.
b. a student makes a mistake when measuring volume.
c. the hypothesis was unrelated to the research question.
d. temperature readings are made late in the day, when everyone is tired and eager to go home.

Laboratory mice are similar but not identical to each other. (apex)

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

not sure if this is what you'r looking for nnew= nold