Option 1: The volunteers are split into 2 groups by a random process. One group will read the article and the other will not. Everyone will then look at
the city pictures and the diameter of their pupil will be measured while
they look at the pictures. *
Option
Survey
Observational study
Experimental study

Experimental study

Step-by-step explanation:

experimental studies are controlled by the researcher and often the participants are grouped randomly. An difference in the data observed of both groups would be due to intervention of the experimenter.

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles