Person to get this right will get brainliest: What piece of technology involves hardware and is useful to many people these days?

Would really appreciate it, i have an idea but not completely sure

Abiologist counts the number of rabbits in a population each year and observes a decrease in population. since the coyote population has exploded, the biologist concludes that the coyote population has had a negative interaction with the rabbit population. which describes the biologist’s actions? a.) experimentationb.) inferencec.) observationd.) interacting

Wich is not standing in the way of astronomers getting a good view of different star