About how many years passed between the beginning of the Vedic Period and the start of the Gupta Empire? Group of answer choices

200

1000

1800

6000

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food