Answer:
Geiger counters are commonly used to measure the amount of radioactivity, but there are other types of detectors that may be used
Explanation:
The right answer is A. producer.
Phytoplankton are all cyanobacteria and microalgae (microscopic plants) present in surface waters and drifting with the currents. Unknown because invisible to the naked eye, phytoplankton is the lung of our planet. Thanks to photosynthesis, it produces more than half of the Earth's oxygen and consumes half of the carbon dioxide. Phytoplankton is essential for marine life because it is also at the base of the ocean food chain.
I think that genetic engineering is a good idea because it helps cure deseases that people cant cure, and could possibly cure cancer some day.
Hope my oppinion helped!
