Answer:
Predation
Explanation:
A relationship in which one species consumes and the other is killed is known ans predation.
For example;
Take the came of a tiger and a deer, in this case the tiger is the cunsumer or the predator while the deer is being killed and devoured
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Lipids and proteins
(however our bodies mostly break down sugars e.g. glucose and are the only molecules we can break down without the need for oxygen)
It sends an electrical impulse to make your heart beat. The job of a pacemaker is to artificially take over the role of your sinus node if it isn't working properly. Electrical impulses are sent by the pacemaker to stimulate your heart to contract and produce a heartbeat