Why do elements in a group have similar chemical properies?

Both independent and dependent clauses

There are multiple tuning forks present in the room, and annie strikes one with a natural frequency of 400 hz. which of these other tuning forks will begin to vibrate through resonance and make the sound louder? a 200 hz tuning fork a 400 hz tuning fork a 800 hz tuning fork a 1600 hz tuning fork

The two way interaction between aspects of the environment and aspects of the individual in the shaping of personality traits is called?