The animal it gave birth to
Absolute time measurements can be used to calibrate the relative time scale, producing an integrated geologic or <em>"geochronologic"</em> time scale. The overall duration and relative length of these large geologic intervals is unlikely to change much, but the precise numbers may "wiggle" a bit as a result of new data.
Answer:
Lactic Acid
Explanation:
Lactic acid builds up during strenuous movement combined with lack of sufficient oxygen.
