Which of these could be found in a forest ecosystem?
A.
weather
B.
trees
C.
bears
D.
all of these

all of the above

Explanation:

it all has something to do with natural causes

D.

Explanation:

In a forest ecosystem you would find weather because weather is everywhere on Earth, and you would find trees because a forest has lots of trees, and you would most likely find bears because they are a natural life source and live in most ecosystems.

answer-

the statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

solution-

it solely depends on b, whether the function will have one or two or zero x intercept.

this plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e v shape, with vertex translated to (-a, b), instead of origin.

1-   if b is zero, the graph will have exactly one x-intercept, at x= -a

2- if b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- if b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ the statement is sometimes true.

12