I think can be water, light, temperature, nutrients
Hope help!
I don’t speak Espanol but I think that u mean 2 digestão
Both are made only of oxygen atoms.
They are both gases kept at room temperature.
Both absorb UV-C and more energetic radiation of the Sun.
The eggs of the fluke are passed into water supplies from feces and urine of infected people. After hatching the parasite actively swims and invades the body of a snail, usually by penetrating through the snail's foot. The parasite requires the presence of certain species of snails (e.g., Oncomelania, Biomphalaria, Bulinus) to transform (and multiply) itself into an infective stage, called cercaria.