atomic size increases down a main group and decreases across a period. in a transition series, size remains relatively constant.

it should be all of them because it asks if you included all of those in your answer

explanation:

the answer is definitely c.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !