A population is a group of individuals of the same species living in a specific geographic area.
Population interactions include:
Predation: One organism (predator) kills and eats another (prey).
Competition: Individuals compete for the same resources.
Mutualism: Both species benefit from the relationship.
Parasitism: One species benefits at the expense of another.
(b) Order of the differential equation: $ 5x^3 \frac{d^3y}{dx^3} - 3\left(\frac{dy}{dx}\right)^2 + \left(\frac{d^2y}{dx^2}\right)^4 + y = 0 $