And with that came increased seasonality 的主语是什么

EMALE PROFESSOR:At around 11,500 B.C.E., the world was coming out of an ice age.

FEMALE PROFESSOR:And with that came increased seasonality; that is, the summers became warmer and the winters actually became colder.

请问老师，And with that came increased seasonality 的主语是什么？with that: immediately after doing or saying that

with that

■说完，接着，随即，于是

■接着就；随即

And with that came increased seasonality;

=And with that, increased seasonality came.

1. with that //that 实质上是指代前面所说的事情, 可按实质状况

理解为 到这个点；在那点的基础上

2.increased 指基数不是0的的增加（可类比developed conutries）

3.seasonality 指季节性的变化