Most hormones' secretions are regulated by ___________ feedback, whereby a hormone's secretions are regulated by the hormone its
elf; in contrast, __________ feedback occurs when a hormone is stimulated by a tropic hormone to secrete more of their own hormone as well as the tropic hormone.
Negative, as regulation by the hormone itself means there is an excess, so negative feedback is most likely. While the other is positive for another stimulant is secreted to stimulate the secretion of the hormone. I am not pretty sure, but I really feel like it is the right answer as much as I remember. Hope this helps.
The correct answer is dynamo theory. The theory that explains the source of Earth's magnetic field is the dynamo theory. This theory proposes the mechanism of a celestial body such as Earth to generate magnetic field.
