There are many conditions that makes someone's heart rate change. Below are a few.
1. The person does some physical activities
2. Someone stops doing physical activities
3. Someone is nervous can cause it to change.
I hope these help. Sorry if I misunderstood the question
The relationship between the hermit crabs and the snails is A.commensalism
Why? Commensalism refers to a relationship where one organism benefits from the other without affecting it. In this case, the hermit crab benefits from the snails, via the latter's discarded shells. The crab's use of the snails' shells has no impact on the snails.
The temperature of the Beaker B insulated contains a lower amount of identical liquids and the copper rod which won't keep the system going because it can't with stand to keep a breaker going at a low Celsius of 50 degree 30 degree Celsius less than Breaker A
