According to Copernicus, retrograde motion for Venus must occur around : a. greatest elongation, when the planet is farthest from the Sun.
b. inferior conjunction, when it passes between us and the Sun.
c. superior conjunction, when the planet is on the far side of the Sun.
d. opposition, when the planet lies opposite the Sun in the sky.
e. quadrature, when the planet is 90 degrees away from the Sun.

i would think form in reponse to tensional forces

what best describes physical development during adolescence is the development of secondary sex characteristics happens at a rate unique to each individual.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.