Suppose you observe a bird with a very broad and thick beak. you want to know why the bird's beak is shaped that way how could you begin to use the scientific inquiry process to explore this question check all of the boxes that apply

Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.