Which of the following describes your immune system's specific defenses?
question 14 options:

they respond to a general threat of infection.

they respond to a particular pathogen.

they include fever and inflammation of the infection site.

all of the above

I think the answer is: they respond to a particular pathogen. the question asked for specific defenses. responding to general threat of infection and fever/inflammation at the infection site are all non-specific responses to ALL pathogens and foreign particles.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.