The answer is Nitrification.
The geologic features that help scientists to determine the relative ages of rocks by their positions include index fossils, intrusions, and cross-cutting relationships (Option d).
<h3>What does geological age mean?</h3>
The expression geological age refers to the relative age of a given rock and or fossil (i.e. a piece or trace of dead organism) in a geological time scale.
In conclusion, the geologic features that help scientists to determine the relative ages of rocks by their positions include index fossils, intrusions, and cross-cutting relationships (Option d).
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The answer is number 3 because the species has to adjust rapidly to change their environment.
<span>Many sexually active american adolescents fail to avoid pregnancy because they are not educated on contraceptive methods. </span>
