the answer to your question is POLLUTION
Answer:
- They have dorsal nerve chord.
- They have pair gilled pouches.
- They breathe through gills.
- They have a notochord.
- They are coelomate.
Explanation:
✌Hope I helped ya.✌
Brainliest would be nice
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Nails are made of iron because, iron is strong and sturdy; although nail rust when it undergoes oxidation when expose to water but it is not explosive.
Barium and phosphorus are not suitable for nail making because of their properties.
Barium is an element which reacts with virtually all non metals, forming poisonous products which are dangerous to health and to the environment. It also reacts explosively with water.
Phosphorus is not found in its pure form in nature, it conducts electricity and it is combustible in nature.<span />
The right answers are : Radiant energy and Conservation of energy.
Radiant energy, or radiative energy, is the only energy that can propagate in a vacuum, in the absence of matter. It is based on the principle of electromagnetic radiation, itself based on photon displacement. On a daily basis, radiant energy is very present; this is how the sun illuminates us.
-The energy of an isolated system can not be destroyed or created
.
➥The energy is conserved, and can be transferred from one part of the system to another and / or change shape (heat, speed ...)
.
➥Energy can also switch from one system to another.
Answer:
B-By studying the different ways that people react to emotional
Explanation:
Sociologists will study by observation.
