Question

STAGES IN A RIVER'S LIFE
Most rivers start their course from mountains (the
source), flow through plains (the course) and
finally flow into the sea (the mouth). The course
of a river from its source to its mouth, therefore,
can be divided into three stages—the upper course
(youth), the middle course (maturity) and the lower
course (old age).​

Answer 1

Answer:

Nearly all rivers have an upper, middle, and lower course.

Young River - the upper course.

Middle Aged River - the middle course.

Old River - the lower course.

Answer 2

Answer:

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Explanation:

six is six ixsidi ad ai