Answer:
A, the range of physical and biological conditions in which an organism lives and the way in which it uses those conditions.
Fossils take several hundred thousand years to form and it is rare to find a fossil of skin (skin is usually eaten or rotted away in the first decade, so it rarely turns into a fossil).
Answer:
Airborne transmission may occur if patient respiratory activity or medical procedures generate respiratory aerosols. These aerosols contain particles that may travel much longer distances and remain airborne longer, but their infective potential is uncertain. Contact, droplet and airborne transmission are each relevant during airway manoeuvres in infected patients, particularly during tracheal intubation.
Explanation:
It is probably the type of environment they live in
