When did people begin to notice that coastlines if continents fit together like a puzzle a. when satellite begin taking pictures of earth from space
b. when Alfred Wegener propose the idea of continental drift
c. when early explorers traveled from Europe and Asia to the Americas
d. when geologists first started examining the fossil record of South America

B. When Alfred Wegener propose the idea of continental drift

Explanation:

The first true explanation came from Alfred Wegener, who proposed the Plate Tectonic Theory. This theory stated, in a nutshell, that the continents different pieces that collided together at faults.

Technically, explorers found out this way back. If you consider this the answer choice, then C is your best answer.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .

i think its through the fallopian tube