The correct answer would be the second option. The type of electromagnetic radiation that is used in kitchen appliances and in radar guns would be microwaves. They have wavelengths from 1 m to 1 mm. It is used in heating and cooking in some kitchen appliances and are being used in radar guns to send signals.
Inert
That means it does not react with other atoms
Answer: D. a genetic bottleneck
Explanation:
A genetic bottleneck also known as a population bottleneck is one that describes a sharp reduction in the size of a population caused by environmental events like in the above or caused by human activities.
It is called the synaptic cleft