One question that scientists have not yet answered is what caused the number of large zebra mussels to decline. How might tracking different parts of the ecosystem over a long time help scientists to answer this question?

What effect does mr. bullers point of view in paragraph 6

Context clues can be definitions, examples, synonyms, or antonyms. the word root can give you an idea of the word’s meaning. affixes can you determine the word’s form and meaning. use the drop-down menus to identify the root in each difficult word. automatic: gratify: untenable:

When a monster in a story does not have the ability to communicate, what is the most likely result?