Let's think of it like this. We have an energy crisis, but how can we solve it? There are three steps. First, we need to recognize that we HAVE a problem that needs to be fixed. Then, we need to determine what's causing the problem. Finally, we need to change how we act in order to solve the problem. Now, let's look at the options.
Is A correct, leaving our behavior unchanged? NO: if we know the cause of the problem, we still need to solve it! What about B: the problems are ignored? NO: you can't solve a problem unless you know it's a problem. C? NO: to solve a problem, you need to find out what's causing it. Finally, let's look at D: behavior is changed after cause is identified. This is correct: not only do we know why it's happening, but we're fixing it!
Answer: D
Cardiac arrest in children is usually caused by respiratory failure.
The correct answer is silicon (SiO4), oxygen (O2), iron (Fe) and magnesium (Mg).
Ferromagnesium silicates are minerals in which cations of iron and magnesium form essential chemical components on the silicate structure (contains SiO4 tetrahedra). The minerals from this group include the olivines, pyroxenes, amphiboles, and the micas biotite and phlogopite.
Chromatin is loosely found DNA, it consists of DNA wrapped numerous amounts of protein, called Histones. This wrapping is what assists in DNA to fold and become more compact.
