D. A struggle for existence is apparent.
If a struggle for existence is apparent, natural selection occurs because all of the weak/unfit/unadapted ones die.
The correct answer is C. Oxygen
Hope this helps
-AaronWiseIsBae
Answer:
osbervaison and information
Explanation:
you can osbrve if a person ahs a healthy life stlye and see what they need and what they dont need information you can ask that person for more depth on what happended why they are like that what caused them to be that way if it s good or bad
if someone is coghing and you can obersev and tell that they are sick and if you ask what happedn they will tell you information then you can tell what type of cold they have. HOPES THIS HELPS IF IT DOSE THE GIVE ME AN BRAINLIEST PLS I NEVER HAD ONE.❤
Wat survey
Hope U had a nice day Nd stay warm
