Lactic acid is produced during anaerobic respiration, which is a form of cellular respiration in which oxygen is not present. Lactic acid is produced when you exercise, and it causes your muscles to become tired. It depends how long until you feel the effects of lactic acid, but getting oxygen to your muscles can slow the build-up. Hope this helps! :)
Emerge, emanate, issue mean to come forth. Emerge is used of coming forth from a place shut off from view, or from concealment, or the like, into sight and notice: The sun emerges from behind the clouds.
Ok so <span>The astrolabe was adopted for sea-going
use when sailors learned that they could navigate by measuring the angle
between Polaris (the North Star) and the horizon.
so the answer will be
C
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