Some beetles that visit flowers to harvest nectar get into the flower by chewing through the sides of the petals. as a result, they do not become dusted with pollen. is this a mutualistic interaction?

No

Explanation:

The interaction between two individuals in which both individuals gets benefited from each other is known as mutualism. So in mutualism both individual helps each other for their survival. For example in lichens, fungi provide nutrients to algae and algae provide food to the fungal partner.

Here beetles are benefitted because they are getting food by chewing the petals and harvesting nectar but the trees which produce these flowers are not getting benefits as beetles are not dusted with pollens so their genes are not getting spread by beetles to other flowers. Therefore this interaction is not a mutualistic interaction.

its like this, "if i give a plant an unlimited amount of sunlight,then the plant will grow to its largest possible size."

hope it let me know if it does or doesn't =^-^=

the correct option is option d