Some causes could be the mother smoking, drinking, doing drugs etc. Or even simply her body doesn’t fully accept the baby growing inside her so it acts out against it. Sounds strange but it happens. Also if the mother is sick with Zika or another virus, it can harm the baby’s growth.
Can produce fertile offspring
The answer is “The Earth receives different amounts of solar energy in different regions.” That is D
Rubber factories, smoking cigarettes, and cars.
Planaria lives in freshwater and have eyespots
earthworm live in soil have mouth and anus and they have no eyes