Hashimoto's disease is an autoimmune disordee that decreases the ability of the thyroid gland to produce t3 and t4. the student is modeling the reaction to increased tsh levels in an individual with untreated hashimoto's disease compares to an individual without hashimoto's disease. which of the following should be used as an independent variable?
tsh level
trh level
t3 level
t4 level

TSH level, because if we are testing the levels of TSH with a person who has Hashimoto's disease and one who does not have Hashimoto's disease.

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.