Im not 100% sure but i want to say main sequence stars
<span>Primary endocrine disorders may be due to damage to the hormone producing organ. Karen’s thyroid gland suffered damage from repeated exposure to radiation because of a neck injury. The option which is least likely to be part of a primary endocrine disorder for Karen is decreased osteoblast sensitivity to calcitronin. </span>
Explanation:
D. A change in the amount of polar ice will alter how ocean currents move.
