This is associative learning.
The reactions of George and Ken are based on when they are startled. George will learn to associate his sister's crying with him being startled because it happens every time his sister cries.
Whereas Ken will not know when his sister will cry or when he will be startled by the crying so this has no affect on Ken.
Hence, crying will affect George but not Ken.
It's the 4 the answer I hope it has served you
At the point when the wind transports silt by saltation, little particles are brought about to "bob" or "bounce" by the wind, moving them toward the path the wind is blowing. Essentially, the particles are skiped along the surface once or a few times until they lose energy and additionally lift from the twist, and soon thereafter they rejoin the silt on the ground. It is a type of transport that for the most part prepares little particles, however the size increments with expanded wind speed.
Chloroplasts are used to color plants green and cell walls are only in plants I’m pretty sure so chloroplasts and cell walls
The answer to the question is true