The answer would be 
older peopleshould be vaccinated because elderly individuals are more susceptable to diseases and proper vaccinations can help prevent this matter. some may even think the answer could be antibiotics but antibotics taken repetitively can lose its potency and the body will be immune to its once helpful purpose. hope this helped love
        
                    
             
        
        
        
The portion of Earth’s history during which tectonic forces acted on Earth’s surface.
 
        
                    
             
        
        
        
The smoke from prescribed burn and managed wildfires is an extremely toxic air pollutant that is very dangerous to<span> unborn fetuses, infant children and elderly people</span>. It also affects normal healthy people without warning. Wood smoke pollution is 12 times more carcinogenic than cigarette smoke, attacks the body cells up to 40 times longer, and kills at least 40,000 adults and children every year. It contains a toxic soup of more than 4,000 chemical compounds of harmful gases and particle matter that go deep in the lungs and kill people, 69 of which are known human carcinogens, including arsenic, particulate matter, ozone, sulfur dioxide, carbon monoxide, hydrocarbons, dioxin, nitrogen oxides, and radioactive material. Warnings to stay inside on high pollution days are misleading and false. The tiny particles and gases seep inside of homes reaching up to 70 percent of the outside pollution level. No one is safe inside or outside of their homes.
 
        
                    
             
        
        
        
I believe (not sure) that the answer is B, viruses must invade their host before being able to reproduce.
I remember seeing a diagram of the general life of a virus, and I remember seeing the virus sticking to a cell, merging in, and reproducing thereafter (sort of like a factory). Once again, I am not sure and the answer may as well be another one.
        
             
        
        
        
Answer:
- improved fertility of livestock.
- stronger and leaner livestock.
- animal immunity to diseases.
Explanation:
Whe you talk of Animal agriculture you are referring to those practices of breeding animals for the production of animal products and also for recreational uses/purposes. Technology has impacted animal agriculture positively through:
- <em>improved </em><em>fertility</em><em> of livestock.</em>
- <em> of livestock.stronger and leaner livestock.</em>
- <em> of livestock.stronger and leaner livestock.animal immunity to diseases.</em>