Which statements describe the image produced by a concave lens?check all that apply.
a:the image is always right side up.
b:the image is real
c:the image is larger than the object
d:the image is upside down
e:the image is virtual

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places