Answer:
Newton's 3rd Law
Explanation:
every action has an equal and opposite reaction.
you step on the Lego which pushes a force on the Lego (down), and the Lego gets you back by pushing it's force on you(up).
Matter is everything in the known universe that has mass and takes up space.
Answer:
<em>Comparisons of items eaten for food</em>
Explanation:
If we compare the diet intake of different organisms we will not be able to predict whether the organism has an evolutionary history or not. Hence, comparisons of items eaten for food is the LEAST useful technique to explore evolutionary history among organisms.
Other options mentioned will however be beneficial in understanding the evolutionary history among organisms. For example, analysis of DNA strands of different animal species will tell us the similarities and differences in the DNA strand. As a result, we will e able to predict whether they have evolutionary history or not.