Please help. I will mark you as brainliest and give you points :)

A hummingbird feeding: Mutualism

Explain Interaction: The hummingbird drinks the nectar from the flower and the hummingbird may help pollinate the flower.

I'm a bit confused by the plants on the floor one.

Plants on a Forest Floor: Competition

Explain Interaction: The plants on the forests floor compete with each other for the same resources. Both may not receive enough of those resources. Note: When I was around Middle School and High-school I was only taught mutualism, commensalism, and parasitism, so let me know if competition is not a choice your teacher gives you to choose from or wasn't taught to you

Flea bites human: Parasitism

Explain Interaction: The flea drinks the persons blood as food and the person is hurt. Flea bites can be itchy and become painful. Fleas may also also carry disease.

Clownfish in Anemone: Mutualism (although I hear some people say commensalism)

Explain Interaction: The anemone provides protection and a place to live for the clownfish. The anemone may eat bits of food left over from the clownfish.

the correct answer in apex is tissue development, i know because i just had this question

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.