Answer:
The last ice age
Explanation:
https://www.syvum.com/cgi/online/mult.cgi/exam/regents/earth_science/jun_2017.tdf?2
<span>When an atom gains/loses an electron is becomes an B) Ion. It can either have a positive or negative charge and still be an Ion. A negative charge would be referred to as an anion. A positive charge would be referred to as a cation.</span>
