The poaching of rhinos in namibia has declined since the early 2000 it was observed rewrite in report speech

The scientist said (that) the poaching rhinos in Namibia had declined since the early 2000 it was observed.

Explanation:

We use the reported speech to report what another person said. To make a sentence in reported speech we use verbs like say, tell, ask, etc.

In some cases, we need to change the tense, like in our example, where we put the Present Perfect to Past Perfect Tense, while the rest of the sentence remains the same.

either a donut or a sphere or a pancake or a flat sphere. it depends on where the vertical line is.

if the line goes through the center of the circle and is perpendicular to a diameter containing the center, then you get a flat circle.

if the line and the diameter of a the circle meet in the center of the diameter and at an angle, you get a pancake.

if the line is on the circumference of the circle and is at right angles   to the circle you get a ring.

if the line contains the diameter, you get a sphere.

the the line is parallel to the diameter and touches the circumference, you get a donut.