Answer:
3 materials
Explanation:
The jacket and trousers worn by a firefighter have to be constructed from materials that will withstand intense heat. Aramid fiber is a synthetic fiber that is highly regarded for its strength and heat resistance. Nomex is the trade name for arimid fiber clothing, and this type of material is used in the construction of a firefighter jacket and trousers. Nomex is often combined with Kevlar to increase the strength of the material.
<span>Ecologists study populations by studying changes in growth rates, distributions and genetic compositions. I think through population studies, ecologists can get an idea about the conditions that are influencing the populations being studied. They can also discover how these changes would impact other interacting populations.</span>
Generation,,,,,,,,,,,,,,,,
