What are three characteristics of old rivers

Three characteristics of old rivers are it has low gradient and erosive energy. It is characterized by flood plains.

Explanation:

The large sections of water that is moving are Rivers. Some of the rivers will be older than other rivers in earth. For instance when we compare The Mississippi River with the Brazos River, The Mississippi river is much old. When the river gets older some of the characteristics will be associated with it. It might not be found in other rivers that are not older.

Some of the characteristic that are related with an old river are the following:

"menstrual cycle is a complex cycle that consists of several processes. order of occurrence of steps in menstrual cycle are as follows:

1. high progesterone levels maintain the endometrium lining of the uterus.

2. endometrium lining breaks down and low levels of estrogen stimulate the pituitary to release fsh and lh.

3. fsh and lh stimulates the follicles to develop and the oocyte to produce estrogen.

4. rising estrogen levels suppress fsh production and development of other follicles.

5. a spike in lh causes follicle to rupture.

6. a breakdown of corpus luteum causes progesterone level to drop."

not sure if this what   you'r looking for would be percent composition