The tissue is placental tissue.
Breathing source oxygen elements easy to live human
1930-1950 hope this helps
You didn't put any answer choices, but air and water are generally the greatest.
The correct answer is it lives inside or on a host.
A is incorrect because a parasite steals from the host, without giving anything in return. Much like a leech
C is incorrect because leeches almost always use their host as a food source
D is incorrect because parasites can often dig beneath the host's skin to be hidden from sight