b. seismic waves need a medium for propagation.
Because there’s too much heat
Answer:
A crab lives in the intertidal zone.
A crab spends most of its time scavenging for food in the sand.
Explanation:
These tell us where a crab lives and where/how it feeds.
"A crab has an exoskeleton." is a true statement about the characteristics of a crab, but tells us nothing of its interaction with the environment so is not niche.
"A crab will avoid predators by quickly moving underneath an object to hide."
is a true statement, but is too general to identify a niche. Could be modified to cover niche if it said something like "A crab will avoid predators by quickly moving underneath an abandoned seashell or a coral rock to hide."
Since you didn't tell us the choices, I can pick anything I like.
The one that always does it for me is " foaming brine " .
Answer:
d) 14Ω
Explanation:
series resistors add so therefore 2+4+8=14