The diagram represents magnetic field lines within a region of space. The magnetic field is strongest at point

The magnetic field is strongest at point C.

Explanation:

In a magnetic field, the center is known to be strongest region of the magnetic field while between the two poles outside the bar magnet are the weakest region.

Lines of the magnetic field are seen to be the densest even at the center of the magnetic field while between the poles outside the bar magnet, it is least dense.

A magnetic field is known to be a field which shows the magnetic impact and influence on electric charges, magnetic materials and electric currents.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.