A group of students designed a study which restaurant was preferred by teenagers. To gather data, the students planned to visit a number of restaurants and keep a tally of how many teenagers were at each restaurant. Q. Which type of research design does the study use? A. Sample survey B. Stratified survey C. Experimental survey D. Observational survey PLS HELP I WILL GIVE BRAINLIEST AND 50 POINTS

helicase, i think thats it

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )