Help my sis out pls :)

otayy, leo.

the oldest mountain, we can say its been around for a while now so it would make sense as to why it would be leo. since its been around the earth has changed and moved shifting plates etc, this takes time. making leos answer make more sense. again im not sure abt this response but this answer (leo) should be right

answer; ///(true)/// fusion occurs in the sun's core;