Affiliate Marketing Secrets

I need to take pictures of a list of bio terms and put in a powerpoint and explain how each picture fits the term. Heres the words i need help on:
Population
Community
Ecosystem
Organism with Type III SUrvivorship Curve
Density dependent factor
Density independent factor
R Strategist species
Ecological Niche
Parasitism
Mutusalism
Commensalism
Climax community
Keystone species
succession
Biodiversity
Heterotroph
Decomposer
Euthrophication
Biological magnification
climate change
interspecific competition
intraspecific competition
Pioneer species
food web

1) A condition in the environment that can restrict a population’s growth is a
A) Niche
B) Limiting factor
C) growth factor
2) Which of the following is a measurement of population density?
A) The number of frogs in a pond
B) The number of deaths per year
C) the number of bacteria per square millimeter
3) Which would be least likely to be affected by a density-dependent factor?
A) A small, scattered population
B) A large, dense population
C) A population with a low death rate
Complete each sentence or statement:
The ___method of estimating population size involves measuring every member of a species within a small area.
Space, food, and ___ are density-dependent factors.