Which best explains why openness is important to the progress of science?
it aids in the analysis of complicated numerical data.
it aids in understanding technical papers in academic journals.
it allows scientists to consider ideas that contradict their models or theories.
it allows scientists to design novel experiments that may be difficult to carry out.

because growing process had stoped after 4-5 year

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.

i think its d if wrong im sorry