HELP ME this is a K12 question

The weather is warm and dry.

Which change would a cold front bring?

rain or thunderstorms

extended period of rain or snow

dry air and sunny skies

several days of gray skies

Flock x flock y flock z total pieces of food eaten (from previous page) 147 93 60 food percentage* % % % simulated number of birds in flock for 3rd generation** * divide each flock's total pieces of food by 300, the total number of pieces of food eaten. ** multiply the food percentage for each flock by the total number of birds (30).

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur

Why are human population trends difficult to predict?