A scientist wants to study primary succession. After which ecological event should she begin her research? Choose the correct answer.
A. A retreating glacier exposes bare rock.
B. A fire burns down half of a forest.
C. A hurricane devastates a coral reef.
D. A loss of a tree creates a gap in the forest canopy

the answer a: perseverance !

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.

i think it could possibly be b

the answer is true.

the international phonetic alphabet (a standardized system of phonetic symbols devised and maintained by the international phonetic association) is composed of one or more elements of two basic types, letters and diacritics.