When a sperm and an egg are combined they create a zygote.
Answer:
Below.
Explanation:
Air pollutants.
Allergies.
Chronic sinusitis.
Lack of pertussis immunization.
Malnutrition (particularly in children)
Exposure to chemicals, fumes, and dust.
Smoke inhalation.
Answer:
Hi!
Oh, i'm sorry! Hope your new step-dad will be just as good as your real dad
<3
Note:
Please mark as Brainliest! <3
