Athletes' motivation, the level of competition, the type of sport, and the are the key factors in determining the probability of using anabolic steroids. A. pressure for winning B. age of the athlete C. price of this drug D. expectations of the fans

A.

Explanation:

Definitely the goal of any athletes is to win a  laurel, so that  the energy put into timeless training can be consummated. Therefore the spirit of wining at all cost usually drive most athletes to spike up their systems to  achieve their dreams. Most athletes are  determined to win to satisfy the sponsor, family and relations. Besides coaches who want their work output to be noticed usually led   athletes to spike the systems with steroid .  Besides distractions by social levels, and need to meet up with time wasted ,made some athletes to spike systems.

Thus this collective efforts put pressure on the athletes to win at all cost.

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this