When is a circuit considered a "closed circuit"?
A. When the circuit is "on".
B. When the circuit is "off".
C. When the circuit is incomplete.
D. When a circuit's switch is open.

answer; i believe the correct answer is (a)0

silt loam

hope this

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

the answer is d. embryo