Which of the following would be the greatest cause of mechanical weathering? oxygen the hot sun tree roots growing in rock acids

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.

Ithink is    record the line that the bottom of the meniscus touches. tell me if it is correct

Yes yes yes very good