A pair of scientists proposes two different theories to explain the same set of observations. Which of the following best explains the value of these competing theories? 1 Competing theories can be a source of new, testable ideas. 2Competing theories are necessary to transform a theory into a law. 3Competing theories generate controversy that helps popularize ideas. 4Competing theories allow scientists to combine the most interesting aspects of both theories.

the answer is c i did the same question so i know that's right!

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.