Identify the level of use of the following sentence.

necessarily, therefore, none of them has the completeness of effect which is so marked in the oresteia .

formal
general
informal
substandard

Formal.

Explanation:

Formal language consists of a vocabulary set that will not normally be used in everyday life situations, but in special occasions which requiere a serious and  professional attitude.

Regarding the example sentence, adverbs such as "Necessarily" and "Therefore" are usually used as text initiators on a formal text, rather than in friendly conversations.

the first step is to convey the appropriate emotions.

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.