Question

Which of the following best explains how a biotic factor can control the population of a species in an ecosystem?
A sudden drop in temperature may cause many individuals in a population to die.

Competition between two species may force one of them to migrate to survive.

Disease may lead to a decline in the reproductive rate of the species’ main predator.

Lack of water during a drought may cause many of the individuals in a population to die.

Answer 1

@Opcode @DrAmaQueen @InYourHead

Answer 2

I actually see two answers to this question.
And I'll show you why, soon.

~~~~~~~~~~~~~~~~

Do you know what a "limiting factor" is?

A LIMITING FACTOR is something that LIMITS, or controls, the size of an organic population.

~~~~~~~~~~

There are two kinds of limiting factors, in the world:

1. Biotic factors
2. Abiotic factors

~~~~~~~~~~

BIOTIC factors are factors that are related to LIFE.

Some examples of biotic factors are....

Plants,
Mushrooms,
Birds,
Gazelle
Tigers

These factors can have an effect on the size of a population.

For example...let's pretend that tigers eat gazelle.

They're both biotic factors.
They can both affect each other's population size.

If there are LOTS of tigers,
then the population of gazelles would shrink,
because the tigers would eat them all.

You see?

On the other hand,
if there are NOT a lot of tigers around,
then the population of gazelle would grow,
because nothing would be eating them.

BIOTIC factors are LIVING factors.

~~~~~~~~~~~~~~~

ABIOTIC factors are NONLIVING factors.

Some examples of ABIOTIC factors are...

Temperature
Landscape
Rainfall

These factors can also affect the size of a population.

For example...

let's pretend that grass can only survive, when there's enough rainfall.

If, all of a sudden, it stops raining, for a really long time,
then the grass population would shrink,
because all the grass would die.

You see?

~~~~~~~~~~~~~

So, let's go back to our question:

"Which of the following best explains how a biotic factor can control the population of a species in an ecosystem?"

Like I said before,
I actually see two answers to this question.

The first is COMPETITION.

COMPETITION is where two populations of organisms compete, for the same resources.
Usually, one species dies, or gets driven out.
Either way, the population is affected by a BIOTIC factor.

The other one is DISEASE.
DISEASE, in my opinion, can also be a BIOTIC factor,
because diseases are caused by pathogens.
And most pathogens are BIOTIC. They are LIVING.

~~~~~~~~~~~~~~~~~

Answer 3

Im gona go with Disease may lead to a decline in the reproductive rate of the species’ main predator

Answer 4

thanks for the help

Answer 5

I'd actually go with competition,
only because I've seen this question before. And other people have answered it with Competition.

But really, disease makes perfect sense to me, too.

It's no problem.

Answer 6

Thanks for the heads up :3