Habitat is where it lives, and it's niche is what other organisms it interacts with,what it eats, basically its job in an environment . Think of habitat as the address of the organisms house and the niche kinda like the job it has.
Answer: conocimiento
Explanation: Primer conocimiento de una cosa por medio de las impresiones que comunican los sentidos.
I will choose : Malaria.
Malaria is an infectious disease caused by a parasite of the genus Plasmodium (the most predominant is the falciparum species), spread by the bite of certain species of anopheles mosquitoes. The malaria parasite is mainly transmitted, at night, during the bite by a female mosquito of the genus Anopheles, itself contaminated after stinging an individual with malaria. The parasite infects the victim's liver cells and then circulates in the blood, colonizing the red blood cells and destroying them.
The symptoms are: generalized fatigue, loss of appetite, dizziness, headache, digestive disorders (gastric embarrassment), nausea, vomiting, abdominal pain, diarrhea and diffuse myalgia.
Answer:
It is the study of human population.
The answer is D: A gradual change in a species over time.